Finding the Fourth Proportional to 12,818.52, 17,687.16 and 8,104.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,818.52 : 17,687.16 = 8,104.32 : x
2. Step 2: Convert to fraction form
   12,818.52/17,687.16 = 8,104.32/x
3. Step 3: Cross multiply
   12,818.52x = 17,687.16 × 8,104.32
4. Step 4: Simplify right side
   12,818.52x = 143,342,404.53
5. Step 5: Solve for x
   x = 143,342,404.53/12,818.52
6. Step 6: Final answer
   x = 11,182.45