Finding the Fourth Proportional to 2,801.72, 3,862.32 and 2,211.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,801.72 : 3,862.32 = 2,211.20 : x
2. Step 2: Convert to fraction form
   2,801.72/3,862.32 = 2,211.20/x
3. Step 3: Cross multiply
   2,801.72x = 3,862.32 × 2,211.20
4. Step 4: Simplify right side
   2,801.72x = 8,540,361.98
5. Step 5: Solve for x
   x = 8,540,361.98/2,801.72
6. Step 6: Final answer
   x = 3,048.26