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Finding the Fourth Proportional to 68,628.06, 102,920.22 and 21,870

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Solution

The fourth proportional to 68,628.06, 102,920.22 and 21,870 is: 32,798.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,628.06 : 102,920.22 = 21,870 : x
  2. Step 2: Convert to fraction form
    68,628.06/102,920.22 = 21,870/x
  3. Step 3: Cross multiply
    68,628.06x = 102,920.22 × 21,870
  4. Step 4: Simplify right side
    68,628.06x = 2,250,865,211.40
  5. Step 5: Solve for x
    x = 2,250,865,211.40/68,628.06
  6. Step 6: Final answer
    x = 32,798.03

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