Finding the Fourth Proportional to 2,718.96, 4,079.04 and 870.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,718.96 : 4,079.04 = 870.18 : x
2. Step 2: Convert to fraction form
   2,718.96/4,079.04 = 870.18/x
3. Step 3: Cross multiply
   2,718.96x = 4,079.04 × 870.18
4. Step 4: Simplify right side
   2,718.96x = 3,549,499.03
5. Step 5: Solve for x
   x = 3,549,499.03/2,718.96
6. Step 6: Final answer
   x = 1,305.46