Finding the Fourth Proportional to 2,104.71, 3,155.27 and 807.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.71 : 3,155.27 = 807.09 : x
2. Step 2: Convert to fraction form
   2,104.71/3,155.27 = 807.09/x
3. Step 3: Cross multiply
   2,104.71x = 3,155.27 × 807.09
4. Step 4: Simplify right side
   2,104.71x = 2,546,582.83
5. Step 5: Solve for x
   x = 2,546,582.83/2,104.71
6. Step 6: Final answer
   x = 1,209.94