Finding the Fourth Proportional to 2,607.58, 3,911.55 and 964.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.58 : 3,911.55 = 964.09 : x
2. Step 2: Convert to fraction form
   2,607.58/3,911.55 = 964.09/x
3. Step 3: Cross multiply
   2,607.58x = 3,911.55 × 964.09
4. Step 4: Simplify right side
   2,607.58x = 3,771,086.24
5. Step 5: Solve for x
   x = 3,771,086.24/2,607.58
6. Step 6: Final answer
   x = 1,446.20