Finding the Fourth Proportional to 1,659.57, 2,290.46 and 996.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.57 : 2,290.46 = 996.72 : x
2. Step 2: Convert to fraction form
   1,659.57/2,290.46 = 996.72/x
3. Step 3: Cross multiply
   1,659.57x = 2,290.46 × 996.72
4. Step 4: Simplify right side
   1,659.57x = 2,282,942.31
5. Step 5: Solve for x
   x = 2,282,942.31/1,659.57
6. Step 6: Final answer
   x = 1,375.62