Finding the Fourth Proportional to 1,356.72, 1,872.73 and 964.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.72 : 1,872.73 = 964.88 : x
2. Step 2: Convert to fraction form
   1,356.72/1,872.73 = 964.88/x
3. Step 3: Cross multiply
   1,356.72x = 1,872.73 × 964.88
4. Step 4: Simplify right side
   1,356.72x = 1,806,959.72
5. Step 5: Solve for x
   x = 1,806,959.72/1,356.72
6. Step 6: Final answer
   x = 1,331.86