Finding the Fourth Proportional to 81,974.39, 122,978.37 and 34,589.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,974.39 : 122,978.37 = 34,589.50 : x
2. Step 2: Convert to fraction form
   81,974.39/122,978.37 = 34,589.50/x
3. Step 3: Cross multiply
   81,974.39x = 122,978.37 × 34,589.50
4. Step 4: Simplify right side
   81,974.39x = 4,253,760,329.12
5. Step 5: Solve for x
   x = 4,253,760,329.12/81,974.39
6. Step 6: Final answer
   x = 51,891.33