Finding the Fourth Proportional to 131,404.60, 196,880.10 and 61,139.80

Step by Step Solution

1. Step 1: Write the proportion equation
   131,404.60 : 196,880.10 = 61,139.80 : x
2. Step 2: Convert to fraction form
   131,404.60/196,880.10 = 61,139.80/x
3. Step 3: Cross multiply
   131,404.60x = 196,880.10 × 61,139.80
4. Step 4: Simplify right side
   131,404.60x = 12,037,209,937.98
5. Step 5: Solve for x
   x = 12,037,209,937.98/131,404.60
6. Step 6: Final answer
   x = 91,604.17