Finding the Fourth Proportional to 2,669.27, 4,004.46 and 820.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,669.27 : 4,004.46 = 820.50 : x
2. Step 2: Convert to fraction form
   2,669.27/4,004.46 = 820.50/x
3. Step 3: Cross multiply
   2,669.27x = 4,004.46 × 820.50
4. Step 4: Simplify right side
   2,669.27x = 3,285,659.43
5. Step 5: Solve for x
   x = 3,285,659.43/2,669.27
6. Step 6: Final answer
   x = 1,230.92