Finding the Fourth Proportional to 131,658.10, 197,159.10 and 105,414.10

Step by Step Solution

1. Step 1: Write the proportion equation
   131,658.10 : 197,159.10 = 105,414.10 : x
2. Step 2: Convert to fraction form
   131,658.10/197,159.10 = 105,414.10/x
3. Step 3: Cross multiply
   131,658.10x = 197,159.10 × 105,414.10
4. Step 4: Simplify right side
   131,658.10x = 20,783,349,083.31
5. Step 5: Solve for x
   x = 20,783,349,083.31/131,658.10
6. Step 6: Final answer
   x = 157,858.49