Finding the Fourth Proportional to 108,672.75, 149,795.18 and 85,665.08

Step by Step Solution

1. Step 1: Write the proportion equation
   108,672.75 : 149,795.18 = 85,665.08 : x
2. Step 2: Convert to fraction form
   108,672.75/149,795.18 = 85,665.08/x
3. Step 3: Cross multiply
   108,672.75x = 149,795.18 × 85,665.08
4. Step 4: Simplify right side
   108,672.75x = 12,832,216,078.31
5. Step 5: Solve for x
   x = 12,832,216,078.31/108,672.75
6. Step 6: Final answer
   x = 118,081.27