Finding the Third Proportional to 109,661.50 and 239,154

Step by Step Solution

1. Step 1: Write the proportion equation
   109,661.50 : 239,154 = 239,154 : x
2. Step 2: Convert to fraction form
   109,661.50/239,154 = 239,154/x
3. Step 3: Cross multiply
   109,661.50x = 239,154 × 239,154
4. Step 4: Simplify right side
   109,661.50x = 57,194,635,716
5. Step 5: Solve for x
   x = 57,194,635,716/109,661.50
6. Step 6: Final answer
   x = 521,556.20