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Finding the Fourth Proportional to 717,149,730.76, 989,656,568.51 and 399,623,359.78

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Solution

The fourth proportional to 717,149,730.76, 989,656,568.51 and 399,623,359.78 is: 551,474,630.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,149,730.76 : 989,656,568.51 = 399,623,359.78 : x
  2. Step 2: Convert to fraction form
    717,149,730.76/989,656,568.51 = 399,623,359.78/x
  3. Step 3: Cross multiply
    717,149,730.76x = 989,656,568.51 × 399,623,359.78
  4. Step 4: Simplify right side
    717,149,730.76x = 395,489,882,936,311,936
  5. Step 5: Solve for x
    x = 395,489,882,936,311,936/717,149,730.76
  6. Step 6: Final answer
    x = 551,474,630.71

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