Finding the Fourth Proportional to 2,387.55, 3,580.71 and 743.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.55 : 3,580.71 = 743.25 : x
2. Step 2: Convert to fraction form
   2,387.55/3,580.71 = 743.25/x
3. Step 3: Cross multiply
   2,387.55x = 3,580.71 × 743.25
4. Step 4: Simplify right side
   2,387.55x = 2,661,341.09
5. Step 5: Solve for x
   x = 2,661,341.09/2,387.55
6. Step 6: Final answer
   x = 1,114.68