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Finding the Fourth Proportional to 720,131.25, 993,781.13 and 418,344.69

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Solution

The fourth proportional to 720,131.25, 993,781.13 and 418,344.69 is: 577,315.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,131.25 : 993,781.13 = 418,344.69 : x
  2. Step 2: Convert to fraction form
    720,131.25/993,781.13 = 418,344.69/x
  3. Step 3: Cross multiply
    720,131.25x = 993,781.13 × 418,344.69
  4. Step 4: Simplify right side
    720,131.25x = 415,743,056,665.98
  5. Step 5: Solve for x
    x = 415,743,056,665.98/720,131.25
  6. Step 6: Final answer
    x = 577,315.67

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