Finding the Fourth Proportional to 4,128.72, 5,697.63 and 2,240.31

Step by Step Solution

1. Step 1: Write the proportion equation
   4,128.72 : 5,697.63 = 2,240.31 : x
2. Step 2: Convert to fraction form
   4,128.72/5,697.63 = 2,240.31/x
3. Step 3: Cross multiply
   4,128.72x = 5,697.63 × 2,240.31
4. Step 4: Simplify right side
   4,128.72x = 12,764,457.47
5. Step 5: Solve for x
   x = 12,764,457.47/4,128.72
6. Step 6: Final answer
   x = 3,091.63