Finding the Fourth Proportional to 2,240.25, 3,091.31 and 1,245.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,240.25 : 3,091.31 = 1,245.43 : x
2. Step 2: Convert to fraction form
   2,240.25/3,091.31 = 1,245.43/x
3. Step 3: Cross multiply
   2,240.25x = 3,091.31 × 1,245.43
4. Step 4: Simplify right side
   2,240.25x = 3,849,994.76
5. Step 5: Solve for x
   x = 3,849,994.76/2,240.25
6. Step 6: Final answer
   x = 1,718.56