Finding the Fourth Proportional to 2,134.24, 3,200.86 and 817.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,134.24 : 3,200.86 = 817.72 : x
2. Step 2: Convert to fraction form
   2,134.24/3,200.86 = 817.72/x
3. Step 3: Cross multiply
   2,134.24x = 3,200.86 × 817.72
4. Step 4: Simplify right side
   2,134.24x = 2,617,407.24
5. Step 5: Solve for x
   x = 2,617,407.24/2,134.24
6. Step 6: Final answer
   x = 1,226.39