Finding the Fourth Proportional to 2,539.05, 3,807.76 and 807.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,539.05 : 3,807.76 = 807.27 : x
2. Step 2: Convert to fraction form
   2,539.05/3,807.76 = 807.27/x
3. Step 3: Cross multiply
   2,539.05x = 3,807.76 × 807.27
4. Step 4: Simplify right side
   2,539.05x = 3,073,867.34
5. Step 5: Solve for x
   x = 3,073,867.34/2,539.05
6. Step 6: Final answer
   x = 1,210.64