Finding the Fourth Proportional to 2,960.88, 4,441.31 and 2,780.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,960.88 : 4,441.31 = 2,780.46 : x
2. Step 2: Convert to fraction form
   2,960.88/4,441.31 = 2,780.46/x
3. Step 3: Cross multiply
   2,960.88x = 4,441.31 × 2,780.46
4. Step 4: Simplify right side
   2,960.88x = 12,348,870.90
5. Step 5: Solve for x
   x = 12,348,870.90/2,960.88
6. Step 6: Final answer
   x = 4,170.68