Finding the Fourth Proportional to 12,400.29, 17,124.72 and 8,154.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,400.29 : 17,124.72 = 8,154.09 : x
2. Step 2: Convert to fraction form
   12,400.29/17,124.72 = 8,154.09/x
3. Step 3: Cross multiply
   12,400.29x = 17,124.72 × 8,154.09
4. Step 4: Simplify right side
   12,400.29x = 139,636,577.29
5. Step 5: Solve for x
   x = 139,636,577.29/12,400.29
6. Step 6: Final answer
   x = 11,260.75