Finding the Fourth Proportional to 2,451.20, 3,677.10 and 807.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,451.20 : 3,677.10 = 807.30 : x
2. Step 2: Convert to fraction form
   2,451.20/3,677.10 = 807.30/x
3. Step 3: Cross multiply
   2,451.20x = 3,677.10 × 807.30
4. Step 4: Simplify right side
   2,451.20x = 2,968,522.83
5. Step 5: Solve for x
   x = 2,968,522.83/2,451.20
6. Step 6: Final answer
   x = 1,211.05