Finding the Fourth Proportional to 12,435.13, 17,143.61 and 8,449.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,435.13 : 17,143.61 = 8,449.32 : x
2. Step 2: Convert to fraction form
   12,435.13/17,143.61 = 8,449.32/x
3. Step 3: Cross multiply
   12,435.13x = 17,143.61 × 8,449.32
4. Step 4: Simplify right side
   12,435.13x = 144,851,846.85
5. Step 5: Solve for x
   x = 144,851,846.85/12,435.13
6. Step 6: Final answer
   x = 11,648.60