Finding the Fourth Proportional to 2,886.88, 3,978.84 and 2,472.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,886.88 : 3,978.84 = 2,472.16 : x
2. Step 2: Convert to fraction form
   2,886.88/3,978.84 = 2,472.16/x
3. Step 3: Cross multiply
   2,886.88x = 3,978.84 × 2,472.16
4. Step 4: Simplify right side
   2,886.88x = 9,836,329.09
5. Step 5: Solve for x
   x = 9,836,329.09/2,886.88
6. Step 6: Final answer
   x = 3,407.25