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Finding the Fourth Proportional to 390,623.99, 585,937.47 and 137,767.15

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Solution

The fourth proportional to 390,623.99, 585,937.47 and 137,767.15 is: 206,651.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,623.99 : 585,937.47 = 137,767.15 : x
  2. Step 2: Convert to fraction form
    390,623.99/585,937.47 = 137,767.15/x
  3. Step 3: Cross multiply
    390,623.99x = 585,937.47 × 137,767.15
  4. Step 4: Simplify right side
    390,623.99x = 80,722,937,829.64
  5. Step 5: Solve for x
    x = 80,722,937,829.64/390,623.99
  6. Step 6: Final answer
    x = 206,651.25

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