Finding the Fourth Proportional to 1,042.72, 1,439.17 and 793.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.72 : 1,439.17 = 793.60 : x
2. Step 2: Convert to fraction form
   1,042.72/1,439.17 = 793.60/x
3. Step 3: Cross multiply
   1,042.72x = 1,439.17 × 793.60
4. Step 4: Simplify right side
   1,042.72x = 1,142,119.73
5. Step 5: Solve for x
   x = 1,142,119.73/1,042.72
6. Step 6: Final answer
   x = 1,095.32