Finding the Fourth Proportional to 2,212.30, 3,315.97 and 961.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,212.30 : 3,315.97 = 961.46 : x
2. Step 2: Convert to fraction form
   2,212.30/3,315.97 = 961.46/x
3. Step 3: Cross multiply
   2,212.30x = 3,315.97 × 961.46
4. Step 4: Simplify right side
   2,212.30x = 3,188,172.52
5. Step 5: Solve for x
   x = 3,188,172.52/2,212.30
6. Step 6: Final answer
   x = 1,441.11