Finding the Fourth Proportional to 82,765.60, 123,585.55 and 78,088.15

Step by Step Solution

1. Step 1: Write the proportion equation
   82,765.60 : 123,585.55 = 78,088.15 : x
2. Step 2: Convert to fraction form
   82,765.60/123,585.55 = 78,088.15/x
3. Step 3: Cross multiply
   82,765.60x = 123,585.55 × 78,088.15
4. Step 4: Simplify right side
   82,765.60x = 9,650,566,925.49
5. Step 5: Solve for x
   x = 9,650,566,925.49/82,765.60
6. Step 6: Final answer
   x = 116,601.19