Finding the Fourth Proportional to 2,809.89, 4,214.23 and 961.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,809.89 : 4,214.23 = 961.07 : x
2. Step 2: Convert to fraction form
   2,809.89/4,214.23 = 961.07/x
3. Step 3: Cross multiply
   2,809.89x = 4,214.23 × 961.07
4. Step 4: Simplify right side
   2,809.89x = 4,050,146.55
5. Step 5: Solve for x
   x = 4,050,146.55/2,809.89
6. Step 6: Final answer
   x = 1,441.39