Finding the Fourth Proportional to 2,649.72, 3,973.90 and 1,090.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,649.72 : 3,973.90 = 1,090.16 : x
2. Step 2: Convert to fraction form
   2,649.72/3,973.90 = 1,090.16/x
3. Step 3: Cross multiply
   2,649.72x = 3,973.90 × 1,090.16
4. Step 4: Simplify right side
   2,649.72x = 4,332,166.95
5. Step 5: Solve for x
   x = 4,332,166.95/2,649.72
6. Step 6: Final answer
   x = 1,634.95