Finding the Fourth Proportional to 8,429.42, 12,645.72 and 3,234.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.42 : 12,645.72 = 3,234.90 : x
2. Step 2: Convert to fraction form
   8,429.42/12,645.72 = 3,234.90/x
3. Step 3: Cross multiply
   8,429.42x = 12,645.72 × 3,234.90
4. Step 4: Simplify right side
   8,429.42x = 40,907,639.63
5. Step 5: Solve for x
   x = 40,907,639.63/8,429.42
6. Step 6: Final answer
   x = 4,852.96