Finding the Fourth Proportional to 81,981.24, 122,735.34 and 48,144.72

Step by Step Solution

1. Step 1: Write the proportion equation
   81,981.24 : 122,735.34 = 48,144.72 : x
2. Step 2: Convert to fraction form
   81,981.24/122,735.34 = 48,144.72/x
3. Step 3: Cross multiply
   81,981.24x = 122,735.34 × 48,144.72
4. Step 4: Simplify right side
   81,981.24x = 5,909,058,578.40
5. Step 5: Solve for x
   x = 5,909,058,578.40/81,981.24
6. Step 6: Final answer
   x = 72,078.18