Finding the Fourth Proportional to 2,451.10, 3,677.21 and 807.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,451.10 : 3,677.21 = 807.82 : x
2. Step 2: Convert to fraction form
   2,451.10/3,677.21 = 807.82/x
3. Step 3: Cross multiply
   2,451.10x = 3,677.21 × 807.82
4. Step 4: Simplify right side
   2,451.10x = 2,970,523.78
5. Step 5: Solve for x
   x = 2,970,523.78/2,451.10
6. Step 6: Final answer
   x = 1,211.91