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Finding the Fourth Proportional to 721,606.32, 995,801.82 and 399,316.20

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Solution

The fourth proportional to 721,606.32, 995,801.82 and 399,316.20 is: 551,048.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,606.32 : 995,801.82 = 399,316.20 : x
  2. Step 2: Convert to fraction form
    721,606.32/995,801.82 = 399,316.20/x
  3. Step 3: Cross multiply
    721,606.32x = 995,801.82 × 399,316.20
  4. Step 4: Simplify right side
    721,606.32x = 397,639,798,715.48
  5. Step 5: Solve for x
    x = 397,639,798,715.48/721,606.32
  6. Step 6: Final answer
    x = 551,048.11

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