Finding the Fourth Proportional to 81,105.58, 121,662.42 and 31,168.18

Step by Step Solution

1. Step 1: Write the proportion equation
   81,105.58 : 121,662.42 = 31,168.18 : x
2. Step 2: Convert to fraction form
   81,105.58/121,662.42 = 31,168.18/x
3. Step 3: Cross multiply
   81,105.58x = 121,662.42 × 31,168.18
4. Step 4: Simplify right side
   81,105.58x = 3,791,996,205.80
5. Step 5: Solve for x
   x = 3,791,996,205.80/81,105.58
6. Step 6: Final answer
   x = 46,753.83