Finding the Fourth Proportional to 2,607.78, 3,911.48 and 963.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.78 : 3,911.48 = 963.56 : x
2. Step 2: Convert to fraction form
   2,607.78/3,911.48 = 963.56/x
3. Step 3: Cross multiply
   2,607.78x = 3,911.48 × 963.56
4. Step 4: Simplify right side
   2,607.78x = 3,768,945.67
5. Step 5: Solve for x
   x = 3,768,945.67/2,607.78
6. Step 6: Final answer
   x = 1,445.27