Finding the Fourth Proportional to 139,453.92, 209,158.86 and 115,912.68

Step by Step Solution

1. Step 1: Write the proportion equation
   139,453.92 : 209,158.86 = 115,912.68 : x
2. Step 2: Convert to fraction form
   139,453.92/209,158.86 = 115,912.68/x
3. Step 3: Cross multiply
   139,453.92x = 209,158.86 × 115,912.68
4. Step 4: Simplify right side
   139,453.92x = 24,244,164,008.34
5. Step 5: Solve for x
   x = 24,244,164,008.34/139,453.92
6. Step 6: Final answer
   x = 173,850.72