Finding the Fourth Proportional to 4,128.78, 5,697.72 and 2,240.34

Step by Step Solution

1. Step 1: Write the proportion equation
   4,128.78 : 5,697.72 = 2,240.34 : x
2. Step 2: Convert to fraction form
   4,128.78/5,697.72 = 2,240.34/x
3. Step 3: Cross multiply
   4,128.78x = 5,697.72 × 2,240.34
4. Step 4: Simplify right side
   4,128.78x = 12,764,830.02
5. Step 5: Solve for x
   x = 12,764,830.02/4,128.78
6. Step 6: Final answer
   x = 3,091.67