Finding the Fourth Proportional to 9,298.88, 12,828.12 and 5,760.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,298.88 : 12,828.12 = 5,760.80 : x
2. Step 2: Convert to fraction form
   9,298.88/12,828.12 = 5,760.80/x
3. Step 3: Cross multiply
   9,298.88x = 12,828.12 × 5,760.80
4. Step 4: Simplify right side
   9,298.88x = 73,900,233.70
5. Step 5: Solve for x
   x = 73,900,233.70/9,298.88
6. Step 6: Final answer
   x = 7,947.22