Finding the Fourth Proportional to 123,665.36, 170,744.63 and 109,214.55

Step by Step Solution

1. Step 1: Write the proportion equation
   123,665.36 : 170,744.63 = 109,214.55 : x
2. Step 2: Convert to fraction form
   123,665.36/170,744.63 = 109,214.55/x
3. Step 3: Cross multiply
   123,665.36x = 170,744.63 × 109,214.55
4. Step 4: Simplify right side
   123,665.36x = 18,647,797,384.29
5. Step 5: Solve for x
   x = 18,647,797,384.29/123,665.36
6. Step 6: Final answer
   x = 150,792.41