Finding the Fourth Proportional to 2,240.30, 3,091.56 and 1,245.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,240.30 : 3,091.56 = 1,245.53 : x
2. Step 2: Convert to fraction form
   2,240.30/3,091.56 = 1,245.53/x
3. Step 3: Cross multiply
   2,240.30x = 3,091.56 × 1,245.53
4. Step 4: Simplify right side
   2,240.30x = 3,850,630.73
5. Step 5: Solve for x
   x = 3,850,630.73/2,240.30
6. Step 6: Final answer
   x = 1,718.80