Finding the Fourth Proportional to 2,623.05, 3,934.78 and 774.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,623.05 : 3,934.78 = 774.12 : x
2. Step 2: Convert to fraction form
   2,623.05/3,934.78 = 774.12/x
3. Step 3: Cross multiply
   2,623.05x = 3,934.78 × 774.12
4. Step 4: Simplify right side
   2,623.05x = 3,046,004.71
5. Step 5: Solve for x
   x = 3,046,004.71/2,623.05
6. Step 6: Final answer
   x = 1,161.25