Finding the Fourth Proportional to 2,790.72, 3,851.28 and 2,090.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,790.72 : 3,851.28 = 2,090.88 : x
2. Step 2: Convert to fraction form
   2,790.72/3,851.28 = 2,090.88/x
3. Step 3: Cross multiply
   2,790.72x = 3,851.28 × 2,090.88
4. Step 4: Simplify right side
   2,790.72x = 8,052,564.33
5. Step 5: Solve for x
   x = 8,052,564.33/2,790.72
6. Step 6: Final answer
   x = 2,885.48