Finding the Fourth Proportional to 1,039.18, 1,432.55 and 743.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.18 : 1,432.55 = 743.94 : x
2. Step 2: Convert to fraction form
   1,039.18/1,432.55 = 743.94/x
3. Step 3: Cross multiply
   1,039.18x = 1,432.55 × 743.94
4. Step 4: Simplify right side
   1,039.18x = 1,065,731.25
5. Step 5: Solve for x
   x = 1,065,731.25/1,039.18
6. Step 6: Final answer
   x = 1,025.55