Finding the Fourth Proportional to 8,429.12, 12,649.32 and 3,498.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.12 : 12,649.32 = 3,498.76 : x
2. Step 2: Convert to fraction form
   8,429.12/12,649.32 = 3,498.76/x
3. Step 3: Cross multiply
   8,429.12x = 12,649.32 × 3,498.76
4. Step 4: Simplify right side
   8,429.12x = 44,256,854.10
5. Step 5: Solve for x
   x = 44,256,854.10/8,429.12
6. Step 6: Final answer
   x = 5,250.47