Finding the Fourth Proportional to 1,658.48, 2,288.72 and 912.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,658.48 : 2,288.72 = 912.42 : x
2. Step 2: Convert to fraction form
   1,658.48/2,288.72 = 912.42/x
3. Step 3: Cross multiply
   1,658.48x = 2,288.72 × 912.42
4. Step 4: Simplify right side
   1,658.48x = 2,088,276.18
5. Step 5: Solve for x
   x = 2,088,276.18/1,658.48
6. Step 6: Final answer
   x = 1,259.15