Finding the Fourth Proportional to 2,796.85, 4,192.80 and 1,408.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,796.85 : 4,192.80 = 1,408.21 : x
2. Step 2: Convert to fraction form
   2,796.85/4,192.80 = 1,408.21/x
3. Step 3: Cross multiply
   2,796.85x = 4,192.80 × 1,408.21
4. Step 4: Simplify right side
   2,796.85x = 5,904,342.89
5. Step 5: Solve for x
   x = 5,904,342.89/2,796.85
6. Step 6: Final answer
   x = 2,111.07