Finding the Fourth Proportional to 81,708.72, 122,548.50 and 21,737.52

Step by Step Solution

1. Step 1: Write the proportion equation
   81,708.72 : 122,548.50 = 21,737.52 : x
2. Step 2: Convert to fraction form
   81,708.72/122,548.50 = 21,737.52/x
3. Step 3: Cross multiply
   81,708.72x = 122,548.50 × 21,737.52
4. Step 4: Simplify right side
   81,708.72x = 2,663,900,469.72
5. Step 5: Solve for x
   x = 2,663,900,469.72/81,708.72
6. Step 6: Final answer
   x = 32,602.40