Finding the Fourth Proportional to 1,160.78, 1,738.76 and 965.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.78 : 1,738.76 = 965.30 : x
2. Step 2: Convert to fraction form
   1,160.78/1,738.76 = 965.30/x
3. Step 3: Cross multiply
   1,160.78x = 1,738.76 × 965.30
4. Step 4: Simplify right side
   1,160.78x = 1,678,411.51
5. Step 5: Solve for x
   x = 1,678,411.51/1,160.78
6. Step 6: Final answer
   x = 1,445.94