Finding the Fourth Proportional to 80,866.50, 121,165.64 and 49,180.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,866.50 : 121,165.64 = 49,180.72 : x
2. Step 2: Convert to fraction form
   80,866.50/121,165.64 = 49,180.72/x
3. Step 3: Cross multiply
   80,866.50x = 121,165.64 × 49,180.72
4. Step 4: Simplify right side
   80,866.50x = 5,959,013,414.46
5. Step 5: Solve for x
   x = 5,959,013,414.46/80,866.50
6. Step 6: Final answer
   x = 73,689.52