Finding the Fourth Proportional to 88,640,692.56, 121,437,182.32 and 85,325,942.72

Step by Step Solution

1. Step 1: Write the proportion equation
   88,640,692.56 : 121,437,182.32 = 85,325,942.72 : x
2. Step 2: Convert to fraction form
   88,640,692.56/121,437,182.32 = 85,325,942.72/x
3. Step 3: Cross multiply
   88,640,692.56x = 121,437,182.32 × 85,325,942.72
4. Step 4: Simplify right side
   88,640,692.56x = 10,361,742,062,714,516
5. Step 5: Solve for x
   x = 10,361,742,062,714,516/88,640,692.56
6. Step 6: Final answer
   x = 116,895,996.22