Finding the Fourth Proportional to 8,429.29, 12,651.71 and 4,272.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.29 : 12,651.71 = 4,272.25 : x
2. Step 2: Convert to fraction form
   8,429.29/12,651.71 = 4,272.25/x
3. Step 3: Cross multiply
   8,429.29x = 12,651.71 × 4,272.25
4. Step 4: Simplify right side
   8,429.29x = 54,051,238.78
5. Step 5: Solve for x
   x = 54,051,238.78/8,429.29
6. Step 6: Final answer
   x = 6,412.31