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Finding the Fourth Proportional to 42,802.06, 64,216.02 and 12,817.28

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Solution

The fourth proportional to 42,802.06, 64,216.02 and 12,817.28 is: 19,229.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,802.06 : 64,216.02 = 12,817.28 : x
  2. Step 2: Convert to fraction form
    42,802.06/64,216.02 = 12,817.28/x
  3. Step 3: Cross multiply
    42,802.06x = 64,216.02 × 12,817.28
  4. Step 4: Simplify right side
    42,802.06x = 823,074,708.83
  5. Step 5: Solve for x
    x = 823,074,708.83/42,802.06
  6. Step 6: Final answer
    x = 19,229.79

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