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Finding the Fourth Proportional to 19,811.98, 29,722.92 and 13,979.98

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Solution

The fourth proportional to 19,811.98, 29,722.92 and 13,979.98 is: 20,973.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,811.98 : 29,722.92 = 13,979.98 : x
  2. Step 2: Convert to fraction form
    19,811.98/29,722.92 = 13,979.98/x
  3. Step 3: Cross multiply
    19,811.98x = 29,722.92 × 13,979.98
  4. Step 4: Simplify right side
    19,811.98x = 415,525,827.14
  5. Step 5: Solve for x
    x = 415,525,827.14/19,811.98
  6. Step 6: Final answer
    x = 20,973.46

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