Finding the Fourth Proportional to 9,766.18, 13,478.55 and 5,517.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,766.18 : 13,478.55 = 5,517.45 : x
2. Step 2: Convert to fraction form
   9,766.18/13,478.55 = 5,517.45/x
3. Step 3: Cross multiply
   9,766.18x = 13,478.55 × 5,517.45
4. Step 4: Simplify right side
   9,766.18x = 74,367,236.04
5. Step 5: Solve for x
   x = 74,367,236.04/9,766.18
6. Step 6: Final answer
   x = 7,614.77