Finding the Fourth Proportional to 131,397.20, 196,969.89 and 83,878.25

Step by Step Solution

1. Step 1: Write the proportion equation
   131,397.20 : 196,969.89 = 83,878.25 : x
2. Step 2: Convert to fraction form
   131,397.20/196,969.89 = 83,878.25/x
3. Step 3: Cross multiply
   131,397.20x = 196,969.89 × 83,878.25
4. Step 4: Simplify right side
   131,397.20x = 16,521,489,005.59
5. Step 5: Solve for x
   x = 16,521,489,005.59/131,397.20
6. Step 6: Final answer
   x = 125,737.00