Finding the Fourth Proportional to 81,441.50, 122,132.22 and 28,119.86

Step by Step Solution

1. Step 1: Write the proportion equation
   81,441.50 : 122,132.22 = 28,119.86 : x
2. Step 2: Convert to fraction form
   81,441.50/122,132.22 = 28,119.86/x
3. Step 3: Cross multiply
   81,441.50x = 122,132.22 × 28,119.86
4. Step 4: Simplify right side
   81,441.50x = 3,434,340,927.89
5. Step 5: Solve for x
   x = 3,434,340,927.89/81,441.50
6. Step 6: Final answer
   x = 42,169.42