Finding the Fourth Proportional to 1,334.28, 1,841.50 and 774.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,334.28 : 1,841.50 = 774.78 : x
2. Step 2: Convert to fraction form
   1,334.28/1,841.50 = 774.78/x
3. Step 3: Cross multiply
   1,334.28x = 1,841.50 × 774.78
4. Step 4: Simplify right side
   1,334.28x = 1,426,757.37
5. Step 5: Solve for x
   x = 1,426,757.37/1,334.28
6. Step 6: Final answer
   x = 1,069.31