Finding the Fourth Proportional to 2,799.72, 3,868.56 and 2,214.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,799.72 : 3,868.56 = 2,214.90 : x
2. Step 2: Convert to fraction form
   2,799.72/3,868.56 = 2,214.90/x
3. Step 3: Cross multiply
   2,799.72x = 3,868.56 × 2,214.90
4. Step 4: Simplify right side
   2,799.72x = 8,568,473.54
5. Step 5: Solve for x
   x = 8,568,473.54/2,799.72
6. Step 6: Final answer
   x = 3,060.48