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Finding the Fourth Proportional to 722,116.72, 996,577.17 and 399,856.80

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Solution

The fourth proportional to 722,116.72, 996,577.17 and 399,856.80 is: 551,833.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,116.72 : 996,577.17 = 399,856.80 : x
  2. Step 2: Convert to fraction form
    722,116.72/996,577.17 = 399,856.80/x
  3. Step 3: Cross multiply
    722,116.72x = 996,577.17 × 399,856.80
  4. Step 4: Simplify right side
    722,116.72x = 398,488,162,636.15
  5. Step 5: Solve for x
    x = 398,488,162,636.15/722,116.72
  6. Step 6: Final answer
    x = 551,833.45

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