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Finding the Fourth Proportional to 21,212.80, 29,273.60 and 12,826.88

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Solution

The fourth proportional to 21,212.80, 29,273.60 and 12,826.88 is: 17,701.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.80 : 29,273.60 = 12,826.88 : x
  2. Step 2: Convert to fraction form
    21,212.80/29,273.60 = 12,826.88/x
  3. Step 3: Cross multiply
    21,212.80x = 29,273.60 × 12,826.88
  4. Step 4: Simplify right side
    21,212.80x = 375,488,954.37
  5. Step 5: Solve for x
    x = 375,488,954.37/21,212.80
  6. Step 6: Final answer
    x = 17,701.06

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