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Finding the Fourth Proportional to 310,660.09, 465,989.36 and 86,019.78

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Solution

The fourth proportional to 310,660.09, 465,989.36 and 86,019.78 is: 129,029.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,660.09 : 465,989.36 = 86,019.78 : x
  2. Step 2: Convert to fraction form
    310,660.09/465,989.36 = 86,019.78/x
  3. Step 3: Cross multiply
    310,660.09x = 465,989.36 × 86,019.78
  4. Step 4: Simplify right side
    310,660.09x = 40,084,300,634.47
  5. Step 5: Solve for x
    x = 40,084,300,634.47/310,660.09
  6. Step 6: Final answer
    x = 129,029.45

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