Finding the Fourth Proportional to 68,034.20, 102,036.72 and 21,281

Step by Step Solution

1. Step 1: Write the proportion equation
   68,034.20 : 102,036.72 = 21,281 : x
2. Step 2: Convert to fraction form
   68,034.20/102,036.72 = 21,281/x
3. Step 3: Cross multiply
   68,034.20x = 102,036.72 × 21,281
4. Step 4: Simplify right side
   68,034.20x = 2,171,443,438.32
5. Step 5: Solve for x
   x = 2,171,443,438.32/68,034.20
6. Step 6: Final answer
   x = 31,916.94