Finding the Fourth Proportional to 8,613.87, 12,909.78 and 7,498.73

Step by Step Solution

1. Step 1: Write the proportion equation
   8,613.87 : 12,909.78 = 7,498.73 : x
2. Step 2: Convert to fraction form
   8,613.87/12,909.78 = 7,498.73/x
3. Step 3: Cross multiply
   8,613.87x = 12,909.78 × 7,498.73
4. Step 4: Simplify right side
   8,613.87x = 96,806,890.03
5. Step 5: Solve for x
   x = 96,806,890.03/8,613.87
6. Step 6: Final answer
   x = 11,238.49