Finding the Fourth Proportional to 5,560.72, 7,725.28 and 5,509.96

Step by Step Solution

1. Step 1: Write the proportion equation
   5,560.72 : 7,725.28 = 5,509.96 : x
2. Step 2: Convert to fraction form
   5,560.72/7,725.28 = 5,509.96/x
3. Step 3: Cross multiply
   5,560.72x = 7,725.28 × 5,509.96
4. Step 4: Simplify right side
   5,560.72x = 42,565,983.79
5. Step 5: Solve for x
   x = 42,565,983.79/5,560.72
6. Step 6: Final answer
   x = 7,654.76