Finding the Fourth Proportional to 12,790.24, 17,649.32 and 9,434.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,790.24 : 17,649.32 = 9,434.86 : x
2. Step 2: Convert to fraction form
   12,790.24/17,649.32 = 9,434.86/x
3. Step 3: Cross multiply
   12,790.24x = 17,649.32 × 9,434.86
4. Step 4: Simplify right side
   12,790.24x = 166,518,863.30
5. Step 5: Solve for x
   x = 166,518,863.30/12,790.24
6. Step 6: Final answer
   x = 13,019.21