Finding the Fourth Proportional to 131,499.60, 197,103.60 and 72,377.70

Step by Step Solution

1. Step 1: Write the proportion equation
   131,499.60 : 197,103.60 = 72,377.70 : x
2. Step 2: Convert to fraction form
   131,499.60/197,103.60 = 72,377.70/x
3. Step 3: Cross multiply
   131,499.60x = 197,103.60 × 72,377.70
4. Step 4: Simplify right side
   131,499.60x = 14,265,905,229.72
5. Step 5: Solve for x
   x = 14,265,905,229.72/131,499.60
6. Step 6: Final answer
   x = 108,486.30