Finding the Fourth Proportional to 2,387.61, 3,581.45 and 744.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.61 : 3,581.45 = 744.18 : x
2. Step 2: Convert to fraction form
   2,387.61/3,581.45 = 744.18/x
3. Step 3: Cross multiply
   2,387.61x = 3,581.45 × 744.18
4. Step 4: Simplify right side
   2,387.61x = 2,665,243.46
5. Step 5: Solve for x
   x = 2,665,243.46/2,387.61
6. Step 6: Final answer
   x = 1,116.28