Finding the Fourth Proportional to 2,240.05, 3,091.27 and 1,245.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,240.05 : 3,091.27 = 1,245.30 : x
2. Step 2: Convert to fraction form
   2,240.05/3,091.27 = 1,245.30/x
3. Step 3: Cross multiply
   2,240.05x = 3,091.27 × 1,245.30
4. Step 4: Simplify right side
   2,240.05x = 3,849,552.30
5. Step 5: Solve for x
   x = 3,849,552.30/2,240.05
6. Step 6: Final answer
   x = 1,718.52