Finding the Fourth Proportional to 2,240.28, 3,091.60 and 1,245.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,240.28 : 3,091.60 = 1,245.56 : x
2. Step 2: Convert to fraction form
   2,240.28/3,091.60 = 1,245.56/x
3. Step 3: Cross multiply
   2,240.28x = 3,091.60 × 1,245.56
4. Step 4: Simplify right side
   2,240.28x = 3,850,773.30
5. Step 5: Solve for x
   x = 3,850,773.30/2,240.28
6. Step 6: Final answer
   x = 1,718.88