Finding the Fourth Proportional to 1,760.38, 2,638.92 and 718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,760.38 : 2,638.92 = 718.72 : x
2. Step 2: Convert to fraction form
   1,760.38/2,638.92 = 718.72/x
3. Step 3: Cross multiply
   1,760.38x = 2,638.92 × 718.72
4. Step 4: Simplify right side
   1,760.38x = 1,896,644.58
5. Step 5: Solve for x
   x = 1,896,644.58/1,760.38
6. Step 6: Final answer
   x = 1,077.41