Finding the Fourth Proportional to 9,128.64, 12,595.68 and 5,772.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,128.64 : 12,595.68 = 5,772.48 : x
2. Step 2: Convert to fraction form
   9,128.64/12,595.68 = 5,772.48/x
3. Step 3: Cross multiply
   9,128.64x = 12,595.68 × 5,772.48
4. Step 4: Simplify right side
   9,128.64x = 72,708,310.89
5. Step 5: Solve for x
   x = 72,708,310.89/9,128.64
6. Step 6: Final answer
   x = 7,964.86