Finding the Fourth Proportional to 9,766.50, 13,488.72 and 6,617.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,766.50 : 13,488.72 = 6,617.22 : x
2. Step 2: Convert to fraction form
   9,766.50/13,488.72 = 6,617.22/x
3. Step 3: Cross multiply
   9,766.50x = 13,488.72 × 6,617.22
4. Step 4: Simplify right side
   9,766.50x = 89,257,827.76
5. Step 5: Solve for x
   x = 89,257,827.76/9,766.50
6. Step 6: Final answer
   x = 9,139.18