Finding the Fourth Proportional to 2,387.62, 3,580.13 and 743.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.62 : 3,580.13 = 743.72 : x
2. Step 2: Convert to fraction form
   2,387.62/3,580.13 = 743.72/x
3. Step 3: Cross multiply
   2,387.62x = 3,580.13 × 743.72
4. Step 4: Simplify right side
   2,387.62x = 2,662,614.28
5. Step 5: Solve for x
   x = 2,662,614.28/2,387.62
6. Step 6: Final answer
   x = 1,115.18