Finding the Fourth Proportional to 5,697.72, 7,871.31 and 5,653.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,697.72 : 7,871.31 = 5,653.98 : x
2. Step 2: Convert to fraction form
   5,697.72/7,871.31 = 5,653.98/x
3. Step 3: Cross multiply
   5,697.72x = 7,871.31 × 5,653.98
4. Step 4: Simplify right side
   5,697.72x = 44,504,229.31
5. Step 5: Solve for x
   x = 44,504,229.31/5,697.72
6. Step 6: Final answer
   x = 7,810.88