Finding the Fourth Proportional to 1,639.35, 2,460.27 and 774.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,639.35 : 2,460.27 = 774.27 : x
2. Step 2: Convert to fraction form
   1,639.35/2,460.27 = 774.27/x
3. Step 3: Cross multiply
   1,639.35x = 2,460.27 × 774.27
4. Step 4: Simplify right side
   1,639.35x = 1,904,913.25
5. Step 5: Solve for x
   x = 1,904,913.25/1,639.35
6. Step 6: Final answer
   x = 1,161.99