Finding the Fourth Proportional to 80,478.18, 120,796.76 and 60,417.92

Step by Step Solution

1. Step 1: Write the proportion equation
   80,478.18 : 120,796.76 = 60,417.92 : x
2. Step 2: Convert to fraction form
   80,478.18/120,796.76 = 60,417.92/x
3. Step 3: Cross multiply
   80,478.18x = 120,796.76 × 60,417.92
4. Step 4: Simplify right side
   80,478.18x = 7,298,289,434.98
5. Step 5: Solve for x
   x = 7,298,289,434.98/80,478.18
6. Step 6: Final answer
   x = 90,686.56