Finding the Fourth Proportional to 1,333.20, 1,839.78 and 773.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,333.20 : 1,839.78 = 773.71 : x
2. Step 2: Convert to fraction form
   1,333.20/1,839.78 = 773.71/x
3. Step 3: Cross multiply
   1,333.20x = 1,839.78 × 773.71
4. Step 4: Simplify right side
   1,333.20x = 1,423,456.18
5. Step 5: Solve for x
   x = 1,423,456.18/1,333.20
6. Step 6: Final answer
   x = 1,067.70