Finding the Fourth Proportional to 2,810.96, 4,213.61 and 960.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,810.96 : 4,213.61 = 960.82 : x
2. Step 2: Convert to fraction form
   2,810.96/4,213.61 = 960.82/x
3. Step 3: Cross multiply
   2,810.96x = 4,213.61 × 960.82
4. Step 4: Simplify right side
   2,810.96x = 4,048,512.63
5. Step 5: Solve for x
   x = 4,048,512.63/2,810.96
6. Step 6: Final answer
   x = 1,440.26