Finding the Fourth Proportional to 2,387.82, 3,580.77 and 743.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.82 : 3,580.77 = 743.86 : x
2. Step 2: Convert to fraction form
   2,387.82/3,580.77 = 743.86/x
3. Step 3: Cross multiply
   2,387.82x = 3,580.77 × 743.86
4. Step 4: Simplify right side
   2,387.82x = 2,663,591.57
5. Step 5: Solve for x
   x = 2,663,591.57/2,387.82
6. Step 6: Final answer
   x = 1,115.49