Finding the Fourth Proportional to 1,610.38, 2,222.04 and 911.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.38 : 2,222.04 = 911.62 : x
2. Step 2: Convert to fraction form
   1,610.38/2,222.04 = 911.62/x
3. Step 3: Cross multiply
   1,610.38x = 2,222.04 × 911.62
4. Step 4: Simplify right side
   1,610.38x = 2,025,656.10
5. Step 5: Solve for x
   x = 2,025,656.10/1,610.38
6. Step 6: Final answer
   x = 1,257.87