Finding the Fourth Proportional to 1,328.78, 1,833.82 and 739.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,328.78 : 1,833.82 = 739.50 : x
2. Step 2: Convert to fraction form
   1,328.78/1,833.82 = 739.50/x
3. Step 3: Cross multiply
   1,328.78x = 1,833.82 × 739.50
4. Step 4: Simplify right side
   1,328.78x = 1,356,109.89
5. Step 5: Solve for x
   x = 1,356,109.89/1,328.78
6. Step 6: Final answer
   x = 1,020.57