Finding the Third Proportional to 126,028.50 and 263,742

Step by Step Solution

1. Step 1: Write the proportion equation
   126,028.50 : 263,742 = 263,742 : x
2. Step 2: Convert to fraction form
   126,028.50/263,742 = 263,742/x
3. Step 3: Cross multiply
   126,028.50x = 263,742 × 263,742
4. Step 4: Simplify right side
   126,028.50x = 69,559,842,564
5. Step 5: Solve for x
   x = 69,559,842,564/126,028.50
6. Step 6: Final answer
   x = 551,937.40