Finding the Fourth Proportional to 2,611.89, 3,917.76 and 968.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.89 : 3,917.76 = 968.40 : x
2. Step 2: Convert to fraction form
   2,611.89/3,917.76 = 968.40/x
3. Step 3: Cross multiply
   2,611.89x = 3,917.76 × 968.40
4. Step 4: Simplify right side
   2,611.89x = 3,793,958.78
5. Step 5: Solve for x
   x = 3,793,958.78/2,611.89
6. Step 6: Final answer
   x = 1,452.57