Finding the Fourth Proportional to 12,693.08, 17,516.85 and 8,436.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,693.08 : 17,516.85 = 8,436.72 : x
2. Step 2: Convert to fraction form
   12,693.08/17,516.85 = 8,436.72/x
3. Step 3: Cross multiply
   12,693.08x = 17,516.85 × 8,436.72
4. Step 4: Simplify right side
   12,693.08x = 147,784,758.73
5. Step 5: Solve for x
   x = 147,784,758.73/12,693.08
6. Step 6: Final answer
   x = 11,642.94