Finding the Fourth Proportional to 2,386.72, 3,580.77 and 743.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.72 : 3,580.77 = 743.29 : x
2. Step 2: Convert to fraction form
   2,386.72/3,580.77 = 743.29/x
3. Step 3: Cross multiply
   2,386.72x = 3,580.77 × 743.29
4. Step 4: Simplify right side
   2,386.72x = 2,661,544.37
5. Step 5: Solve for x
   x = 2,661,544.37/2,386.72
6. Step 6: Final answer
   x = 1,115.15