Finding the Fourth Proportional to 139,850.82, 209,517.30 and 108,148.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,850.82 : 209,517.30 = 108,148.50 : x
2. Step 2: Convert to fraction form
   139,850.82/209,517.30 = 108,148.50/x
3. Step 3: Cross multiply
   139,850.82x = 209,517.30 × 108,148.50
4. Step 4: Simplify right side
   139,850.82x = 22,658,981,719.05
5. Step 5: Solve for x
   x = 22,658,981,719.05/139,850.82
6. Step 6: Final answer
   x = 162,022.52