Finding the Fourth Proportional to 2,754.36, 4,131.68 and 806.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,754.36 : 4,131.68 = 806.72 : x
2. Step 2: Convert to fraction form
   2,754.36/4,131.68 = 806.72/x
3. Step 3: Cross multiply
   2,754.36x = 4,131.68 × 806.72
4. Step 4: Simplify right side
   2,754.36x = 3,333,108.89
5. Step 5: Solve for x
   x = 3,333,108.89/2,754.36
6. Step 6: Final answer
   x = 1,210.12