Finding the Fourth Proportional to 12,561.28, 17,336.88 and 8,084.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,561.28 : 17,336.88 = 8,084.32 : x
2. Step 2: Convert to fraction form
   12,561.28/17,336.88 = 8,084.32/x
3. Step 3: Cross multiply
   12,561.28x = 17,336.88 × 8,084.32
4. Step 4: Simplify right side
   12,561.28x = 140,156,885.72
5. Step 5: Solve for x
   x = 140,156,885.72/12,561.28
6. Step 6: Final answer
   x = 11,157.85