Finding the Fourth Proportional to 2,422.78, 3,634.78 and 961.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,422.78 : 3,634.78 = 961.45 : x
2. Step 2: Convert to fraction form
   2,422.78/3,634.78 = 961.45/x
3. Step 3: Cross multiply
   2,422.78x = 3,634.78 × 961.45
4. Step 4: Simplify right side
   2,422.78x = 3,494,656.83
5. Step 5: Solve for x
   x = 3,494,656.83/2,422.78
6. Step 6: Final answer
   x = 1,442.42