Finding the Fourth Proportional to 9,288.64, 12,818.72 and 5,561.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,288.64 : 12,818.72 = 5,561.92 : x
2. Step 2: Convert to fraction form
   9,288.64/12,818.72 = 5,561.92/x
3. Step 3: Cross multiply
   9,288.64x = 12,818.72 × 5,561.92
4. Step 4: Simplify right side
   9,288.64x = 71,296,695.14
5. Step 5: Solve for x
   x = 71,296,695.14/9,288.64
6. Step 6: Final answer
   x = 7,675.69