Finding the Fourth Proportional to 2,691.72, 4,038.18 and 1,048.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,691.72 : 4,038.18 = 1,048.32 : x
2. Step 2: Convert to fraction form
   2,691.72/4,038.18 = 1,048.32/x
3. Step 3: Cross multiply
   2,691.72x = 4,038.18 × 1,048.32
4. Step 4: Simplify right side
   2,691.72x = 4,233,304.86
5. Step 5: Solve for x
   x = 4,233,304.86/2,691.72
6. Step 6: Final answer
   x = 1,572.71