Finding the Fourth Proportional to 114,389.28, 157,772.88 and 78,585.12

Step by Step Solution

1. Step 1: Write the proportion equation
   114,389.28 : 157,772.88 = 78,585.12 : x
2. Step 2: Convert to fraction form
   114,389.28/157,772.88 = 78,585.12/x
3. Step 3: Cross multiply
   114,389.28x = 157,772.88 × 78,585.12
4. Step 4: Simplify right side
   114,389.28x = 12,398,600,707.55
5. Step 5: Solve for x
   x = 12,398,600,707.55/114,389.28
6. Step 6: Final answer
   x = 108,389.53