Finding the Fourth Proportional to 9,278.72, 12,803.04 and 5,500.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,278.72 : 12,803.04 = 5,500.96 : x
2. Step 2: Convert to fraction form
   9,278.72/12,803.04 = 5,500.96/x
3. Step 3: Cross multiply
   9,278.72x = 12,803.04 × 5,500.96
4. Step 4: Simplify right side
   9,278.72x = 70,429,010.92
5. Step 5: Solve for x
   x = 70,429,010.92/9,278.72
6. Step 6: Final answer
   x = 7,590.38