Finding the Fourth Proportional to 1,658.34, 2,288.57 and 912.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,658.34 : 2,288.57 = 912.33 : x
2. Step 2: Convert to fraction form
   1,658.34/2,288.57 = 912.33/x
3. Step 3: Cross multiply
   1,658.34x = 2,288.57 × 912.33
4. Step 4: Simplify right side
   1,658.34x = 2,087,931.07
5. Step 5: Solve for x
   x = 2,087,931.07/1,658.34
6. Step 6: Final answer
   x = 1,259.05