Finding the Fourth Proportional to 85,414.72, 128,124.96 and 23,085.76

Step by Step Solution

1. Step 1: Write the proportion equation
   85,414.72 : 128,124.96 = 23,085.76 : x
2. Step 2: Convert to fraction form
   85,414.72/128,124.96 = 23,085.76/x
3. Step 3: Cross multiply
   85,414.72x = 128,124.96 × 23,085.76
4. Step 4: Simplify right side
   85,414.72x = 2,957,862,076.57
5. Step 5: Solve for x
   x = 2,957,862,076.57/85,414.72
6. Step 6: Final answer
   x = 34,629.42