Finding the Fourth Proportional to 1,610.44, 2,222.82 and 912.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.44 : 2,222.82 = 912.22 : x
2. Step 2: Convert to fraction form
   1,610.44/2,222.82 = 912.22/x
3. Step 3: Cross multiply
   1,610.44x = 2,222.82 × 912.22
4. Step 4: Simplify right side
   1,610.44x = 2,027,700.86
5. Step 5: Solve for x
   x = 2,027,700.86/1,610.44
6. Step 6: Final answer
   x = 1,259.10