Finding the Fourth Proportional to 2,606.86, 3,911.80 and 964.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.86 : 3,911.80 = 964.56 : x
2. Step 2: Convert to fraction form
   2,606.86/3,911.80 = 964.56/x
3. Step 3: Cross multiply
   2,606.86x = 3,911.80 × 964.56
4. Step 4: Simplify right side
   2,606.86x = 3,773,165.81
5. Step 5: Solve for x
   x = 3,773,165.81/2,606.86
6. Step 6: Final answer
   x = 1,447.40