Finding the Fourth Proportional to 1,155.92, 1,731.72 and 743.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.92 : 1,731.72 = 743.72 : x
2. Step 2: Convert to fraction form
   1,155.92/1,731.72 = 743.72/x
3. Step 3: Cross multiply
   1,155.92x = 1,731.72 × 743.72
4. Step 4: Simplify right side
   1,155.92x = 1,287,914.80
5. Step 5: Solve for x
   x = 1,287,914.80/1,155.92
6. Step 6: Final answer
   x = 1,114.19