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Finding the Fourth Proportional to 717,906.64, 990,717.66 and 395,628.28

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Solution

The fourth proportional to 717,906.64, 990,717.66 and 395,628.28 is: 545,970.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,906.64 : 990,717.66 = 395,628.28 : x
  2. Step 2: Convert to fraction form
    717,906.64/990,717.66 = 395,628.28/x
  3. Step 3: Cross multiply
    717,906.64x = 990,717.66 × 395,628.28
  4. Step 4: Simplify right side
    717,906.64x = 391,955,923,791.43
  5. Step 5: Solve for x
    x = 391,955,923,791.43/717,906.64
  6. Step 6: Final answer
    x = 545,970.61

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