Finding the Fourth Proportional to 79,978.22, 119,981.94 and 40,018.10

Step by Step Solution

1. Step 1: Write the proportion equation
   79,978.22 : 119,981.94 = 40,018.10 : x
2. Step 2: Convert to fraction form
   79,978.22/119,981.94 = 40,018.10/x
3. Step 3: Cross multiply
   79,978.22x = 119,981.94 × 40,018.10
4. Step 4: Simplify right side
   79,978.22x = 4,801,449,273.11
5. Step 5: Solve for x
   x = 4,801,449,273.11/79,978.22
6. Step 6: Final answer
   x = 60,034.46