Finding the Fourth Proportional to 9,272.80, 12,789.88 and 5,737.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,272.80 : 12,789.88 = 5,737.68 : x
2. Step 2: Convert to fraction form
   9,272.80/12,789.88 = 5,737.68/x
3. Step 3: Cross multiply
   9,272.80x = 12,789.88 × 5,737.68
4. Step 4: Simplify right side
   9,272.80x = 73,384,238.68
5. Step 5: Solve for x
   x = 73,384,238.68/9,272.80
6. Step 6: Final answer
   x = 7,913.92