Finding the Fourth Proportional to 1,658.38, 2,288.52 and 912.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,658.38 : 2,288.52 = 912.28 : x
2. Step 2: Convert to fraction form
   1,658.38/2,288.52 = 912.28/x
3. Step 3: Cross multiply
   1,658.38x = 2,288.52 × 912.28
4. Step 4: Simplify right side
   1,658.38x = 2,087,771.03
5. Step 5: Solve for x
   x = 2,087,771.03/1,658.38
6. Step 6: Final answer
   x = 1,258.92