Finding the Fourth Proportional to 90,142.88, 134,937.52 and 56,706.38

Step by Step Solution

1. Step 1: Write the proportion equation
   90,142.88 : 134,937.52 = 56,706.38 : x
2. Step 2: Convert to fraction form
   90,142.88/134,937.52 = 56,706.38/x
3. Step 3: Cross multiply
   90,142.88x = 134,937.52 × 56,706.38
4. Step 4: Simplify right side
   90,142.88x = 7,651,818,480.96
5. Step 5: Solve for x
   x = 7,651,818,480.96/90,142.88
6. Step 6: Final answer
   x = 84,885.45