Finding the Fourth Proportional to 12,284.99, 16,948.28 and 8,561.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,284.99 : 16,948.28 = 8,561.15 : x
2. Step 2: Convert to fraction form
   12,284.99/16,948.28 = 8,561.15/x
3. Step 3: Cross multiply
   12,284.99x = 16,948.28 × 8,561.15
4. Step 4: Simplify right side
   12,284.99x = 145,096,724.52
5. Step 5: Solve for x
   x = 145,096,724.52/12,284.99
6. Step 6: Final answer
   x = 11,810.89