Finding the Fourth Proportional to 2,638.34, 3,957.48 and 1,079.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.34 : 3,957.48 = 1,079.18 : x
2. Step 2: Convert to fraction form
   2,638.34/3,957.48 = 1,079.18/x
3. Step 3: Cross multiply
   2,638.34x = 3,957.48 × 1,079.18
4. Step 4: Simplify right side
   2,638.34x = 4,270,833.27
5. Step 5: Solve for x
   x = 4,270,833.27/2,638.34
6. Step 6: Final answer
   x = 1,618.76