Finding the Fourth Proportional to 1,333.48, 1,839.78 and 781.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.48 : 1,839.78 = 781.48 : x
2. Step 2: Convert to fraction form
   1,333.48/1,839.78 = 781.48/x
3. Step 3: Cross multiply
   1,333.48x = 1,839.78 × 781.48
4. Step 4: Simplify right side
   1,333.48x = 1,437,751.27
5. Step 5: Solve for x
   x = 1,437,751.27/1,333.48
6. Step 6: Final answer
   x = 1,078.19