Finding the Fourth Proportional to 1,371.77, 1,892.85 and 774.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.77 : 1,892.85 = 774.29 : x
2. Step 2: Convert to fraction form
   1,371.77/1,892.85 = 774.29/x
3. Step 3: Cross multiply
   1,371.77x = 1,892.85 × 774.29
4. Step 4: Simplify right side
   1,371.77x = 1,465,614.83
5. Step 5: Solve for x
   x = 1,465,614.83/1,371.77
6. Step 6: Final answer
   x = 1,068.41