Finding the Fourth Proportional to 2,648.55, 3,973.02 and 774.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.55 : 3,973.02 = 774.48 : x
2. Step 2: Convert to fraction form
   2,648.55/3,973.02 = 774.48/x
3. Step 3: Cross multiply
   2,648.55x = 3,973.02 × 774.48
4. Step 4: Simplify right side
   2,648.55x = 3,077,024.53
5. Step 5: Solve for x
   x = 3,077,024.53/2,648.55
6. Step 6: Final answer
   x = 1,161.78