Finding the Fourth Proportional to 2,107.59, 3,162.20 and 808.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,107.59 : 3,162.20 = 808.76 : x
2. Step 2: Convert to fraction form
   2,107.59/3,162.20 = 808.76/x
3. Step 3: Cross multiply
   2,107.59x = 3,162.20 × 808.76
4. Step 4: Simplify right side
   2,107.59x = 2,557,460.87
5. Step 5: Solve for x
   x = 2,557,460.87/2,107.59
6. Step 6: Final answer
   x = 1,213.45