Finding the Fourth Proportional to 2,718.30, 4,077.72 and 986.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,718.30 : 4,077.72 = 986.52 : x
2. Step 2: Convert to fraction form
   2,718.30/4,077.72 = 986.52/x
3. Step 3: Cross multiply
   2,718.30x = 4,077.72 × 986.52
4. Step 4: Simplify right side
   2,718.30x = 4,022,752.33
5. Step 5: Solve for x
   x = 4,022,752.33/2,718.30
6. Step 6: Final answer
   x = 1,479.88