Finding the Fourth Proportional to 8,061.20, 12,117.40 and 7,446.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,061.20 : 12,117.40 = 7,446.80 : x
2. Step 2: Convert to fraction form
   8,061.20/12,117.40 = 7,446.80/x
3. Step 3: Cross multiply
   8,061.20x = 12,117.40 × 7,446.80
4. Step 4: Simplify right side
   8,061.20x = 90,235,854.32
5. Step 5: Solve for x
   x = 90,235,854.32/8,061.20
6. Step 6: Final answer
   x = 11,193.85