Finding the Fourth Proportional to 88,640,690.27, 121,437,179.27 and 85,325,940.50

Step by Step Solution

1. Step 1: Write the proportion equation
   88,640,690.27 : 121,437,179.27 = 85,325,940.50 : x
2. Step 2: Convert to fraction form
   88,640,690.27/121,437,179.27 = 85,325,940.50/x
3. Step 3: Cross multiply
   88,640,690.27x = 121,437,179.27 × 85,325,940.50
4. Step 4: Simplify right side
   88,640,690.27x = 10,361,741,532,666,538
5. Step 5: Solve for x
   x = 10,361,741,532,666,538/88,640,690.27
6. Step 6: Final answer
   x = 116,895,993.26