Finding the Fourth Proportional to 2,664.57, 3,996.88 and 1,020.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,664.57 : 3,996.88 = 1,020.73 : x
2. Step 2: Convert to fraction form
   2,664.57/3,996.88 = 1,020.73/x
3. Step 3: Cross multiply
   2,664.57x = 3,996.88 × 1,020.73
4. Step 4: Simplify right side
   2,664.57x = 4,079,723.34
5. Step 5: Solve for x
   x = 4,079,723.34/2,664.57
6. Step 6: Final answer
   x = 1,531.10