Finding the Fourth Proportional to 2,608.76, 3,910.70 and 964.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,608.76 : 3,910.70 = 964.86 : x
2. Step 2: Convert to fraction form
   2,608.76/3,910.70 = 964.86/x
3. Step 3: Cross multiply
   2,608.76x = 3,910.70 × 964.86
4. Step 4: Simplify right side
   2,608.76x = 3,773,282.32
5. Step 5: Solve for x
   x = 3,773,282.32/2,608.76
6. Step 6: Final answer
   x = 1,446.39