Finding the Fourth Proportional to 1,940.78, 2,908.56 and 964.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.78 : 2,908.56 = 964.74 : x
2. Step 2: Convert to fraction form
   1,940.78/2,908.56 = 964.74/x
3. Step 3: Cross multiply
   1,940.78x = 2,908.56 × 964.74
4. Step 4: Simplify right side
   1,940.78x = 2,806,004.17
5. Step 5: Solve for x
   x = 2,806,004.17/1,940.78
6. Step 6: Final answer
   x = 1,445.81