Finding the Fourth Proportional to 8,416.32, 12,605.04 and 8,124.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,416.32 : 12,605.04 = 8,124.72 : x
2. Step 2: Convert to fraction form
   8,416.32/12,605.04 = 8,124.72/x
3. Step 3: Cross multiply
   8,416.32x = 12,605.04 × 8,124.72
4. Step 4: Simplify right side
   8,416.32x = 102,412,420.59
5. Step 5: Solve for x
   x = 102,412,420.59/8,416.32
6. Step 6: Final answer
   x = 12,168.31