Finding the Fourth Proportional to 2,240.57, 3,091.98 and 1,245.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,240.57 : 3,091.98 = 1,245.79 : x
2. Step 2: Convert to fraction form
   2,240.57/3,091.98 = 1,245.79/x
3. Step 3: Cross multiply
   2,240.57x = 3,091.98 × 1,245.79
4. Step 4: Simplify right side
   2,240.57x = 3,851,957.76
5. Step 5: Solve for x
   x = 3,851,957.76/2,240.57
6. Step 6: Final answer
   x = 1,719.19