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Finding the Fourth Proportional to 39,896.47, 55,058.30 and 21,991.69

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Solution

The fourth proportional to 39,896.47, 55,058.30 and 21,991.69 is: 30,349.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,896.47 : 55,058.30 = 21,991.69 : x
  2. Step 2: Convert to fraction form
    39,896.47/55,058.30 = 21,991.69/x
  3. Step 3: Cross multiply
    39,896.47x = 55,058.30 × 21,991.69
  4. Step 4: Simplify right side
    39,896.47x = 1,210,825,065.53
  5. Step 5: Solve for x
    x = 1,210,825,065.53/39,896.47
  6. Step 6: Final answer
    x = 30,349.18

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