Finding the Fourth Proportional to 1,610.29, 2,222.22 and 911.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.29 : 2,222.22 = 911.65 : x
2. Step 2: Convert to fraction form
   1,610.29/2,222.22 = 911.65/x
3. Step 3: Cross multiply
   1,610.29x = 2,222.22 × 911.65
4. Step 4: Simplify right side
   1,610.29x = 2,025,886.86
5. Step 5: Solve for x
   x = 2,025,886.86/1,610.29
6. Step 6: Final answer
   x = 1,258.09