Finding the Third Proportional to 123,109.88 and 264,609.28

Step by Step Solution

1. Step 1: Write the proportion equation
   123,109.88 : 264,609.28 = 264,609.28 : x
2. Step 2: Convert to fraction form
   123,109.88/264,609.28 = 264,609.28/x
3. Step 3: Cross multiply
   123,109.88x = 264,609.28 × 264,609.28
4. Step 4: Simplify right side
   123,109.88x = 70,018,071,723.64
5. Step 5: Solve for x
   x = 70,018,071,723.64/123,109.88
6. Step 6: Final answer
   x = 568,744.56