Finding the Fourth Proportional to 2,773.72, 3,828.21 and 2,649.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,773.72 : 3,828.21 = 2,649.16 : x
2. Step 2: Convert to fraction form
   2,773.72/3,828.21 = 2,649.16/x
3. Step 3: Cross multiply
   2,773.72x = 3,828.21 × 2,649.16
4. Step 4: Simplify right side
   2,773.72x = 10,141,540.80
5. Step 5: Solve for x
   x = 10,141,540.80/2,773.72
6. Step 6: Final answer
   x = 3,656.30