Finding the Fourth Proportional to 88,688,411.10, 121,501,092.07 and 85,372,558.25

Step by Step Solution

1. Step 1: Write the proportion equation
   88,688,411.10 : 121,501,092.07 = 85,372,558.25 : x
2. Step 2: Convert to fraction form
   88,688,411.10/121,501,092.07 = 85,372,558.25/x
3. Step 3: Cross multiply
   88,688,411.10x = 121,501,092.07 × 85,372,558.25
4. Step 4: Simplify right side
   88,688,411.10x = 10,372,859,060,184,688
5. Step 5: Solve for x
   x = 10,372,859,060,184,688/88,688,411.10
6. Step 6: Final answer
   x = 116,958,449.60