Finding the Fourth Proportional to 2,387.50, 3,581.64 and 743.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.50 : 3,581.64 = 743.72 : x
2. Step 2: Convert to fraction form
   2,387.50/3,581.64 = 743.72/x
3. Step 3: Cross multiply
   2,387.50x = 3,581.64 × 743.72
4. Step 4: Simplify right side
   2,387.50x = 2,663,721.48
5. Step 5: Solve for x
   x = 2,663,721.48/2,387.50
6. Step 6: Final answer
   x = 1,115.69