Finding the Fourth Proportional to 8,410.32, 12,596.04 and 8,118.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,410.32 : 12,596.04 = 8,118.72 : x
2. Step 2: Convert to fraction form
   8,410.32/12,596.04 = 8,118.72/x
3. Step 3: Cross multiply
   8,410.32x = 12,596.04 × 8,118.72
4. Step 4: Simplify right side
   8,410.32x = 102,263,721.87
5. Step 5: Solve for x
   x = 102,263,721.87/8,410.32
6. Step 6: Final answer
   x = 12,159.31