Finding the Fourth Proportional to 2,144.83, 3,217.59 and 912.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.83 : 3,217.59 = 912.25 : x
2. Step 2: Convert to fraction form
   2,144.83/3,217.59 = 912.25/x
3. Step 3: Cross multiply
   2,144.83x = 3,217.59 × 912.25
4. Step 4: Simplify right side
   2,144.83x = 2,935,246.48
5. Step 5: Solve for x
   x = 2,935,246.48/2,144.83
6. Step 6: Final answer
   x = 1,368.52