Finding the Fourth Proportional to 1,658.08, 2,288.21 and 912.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,658.08 : 2,288.21 = 912.07 : x
2. Step 2: Convert to fraction form
   1,658.08/2,288.21 = 912.07/x
3. Step 3: Cross multiply
   1,658.08x = 2,288.21 × 912.07
4. Step 4: Simplify right side
   1,658.08x = 2,087,007.69
5. Step 5: Solve for x
   x = 2,087,007.69/1,658.08
6. Step 6: Final answer
   x = 1,258.69