Finding the Fourth Proportional to 139,114.29, 208,966.49 and 131,015.91

Step by Step Solution

1. Step 1: Write the proportion equation
   139,114.29 : 208,966.49 = 131,015.91 : x
2. Step 2: Convert to fraction form
   139,114.29/208,966.49 = 131,015.91/x
3. Step 3: Cross multiply
   139,114.29x = 208,966.49 × 131,015.91
4. Step 4: Simplify right side
   139,114.29x = 27,377,934,191.78
5. Step 5: Solve for x
   x = 27,377,934,191.78/139,114.29
6. Step 6: Final answer
   x = 196,801.74