Finding the Third Proportional to 123,016.50 and 260,289

Step by Step Solution

1. Step 1: Write the proportion equation
   123,016.50 : 260,289 = 260,289 : x
2. Step 2: Convert to fraction form
   123,016.50/260,289 = 260,289/x
3. Step 3: Cross multiply
   123,016.50x = 260,289 × 260,289
4. Step 4: Simplify right side
   123,016.50x = 67,750,363,521
5. Step 5: Solve for x
   x = 67,750,363,521/123,016.50
6. Step 6: Final answer
   x = 550,742.08