Finding the Third Proportional to 109,609.88 and 239,056.31

Step by Step Solution

1. Step 1: Write the proportion equation
   109,609.88 : 239,056.31 = 239,056.31 : x
2. Step 2: Convert to fraction form
   109,609.88/239,056.31 = 239,056.31/x
3. Step 3: Cross multiply
   109,609.88x = 239,056.31 × 239,056.31
4. Step 4: Simplify right side
   109,609.88x = 57,147,920,546.10
5. Step 5: Solve for x
   x = 57,147,920,546.10/109,609.88
6. Step 6: Final answer
   x = 521,375.66