Finding the Fourth Proportional to 8,429.76, 12,634.40 and 5,965.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.76 : 12,634.40 = 5,965.30 : x
2. Step 2: Convert to fraction form
   8,429.76/12,634.40 = 5,965.30/x
3. Step 3: Cross multiply
   8,429.76x = 12,634.40 × 5,965.30
4. Step 4: Simplify right side
   8,429.76x = 75,367,986.32
5. Step 5: Solve for x
   x = 75,367,986.32/8,429.76
6. Step 6: Final answer
   x = 8,940.70