Finding the Fourth Proportional to 109,662.20, 164,481.15 and 89,906.30

Step by Step Solution

1. Step 1: Write the proportion equation
   109,662.20 : 164,481.15 = 89,906.30 : x
2. Step 2: Convert to fraction form
   109,662.20/164,481.15 = 89,906.30/x
3. Step 3: Cross multiply
   109,662.20x = 164,481.15 × 89,906.30
4. Step 4: Simplify right side
   109,662.20x = 14,787,891,616.25
5. Step 5: Solve for x
   x = 14,787,891,616.25/109,662.20
6. Step 6: Final answer
   x = 134,849.49