Finding the Third Proportional to 111,215.50 and 262,427

Step by Step Solution

1. Step 1: Write the proportion equation
   111,215.50 : 262,427 = 262,427 : x
2. Step 2: Convert to fraction form
   111,215.50/262,427 = 262,427/x
3. Step 3: Cross multiply
   111,215.50x = 262,427 × 262,427
4. Step 4: Simplify right side
   111,215.50x = 68,867,930,329
5. Step 5: Solve for x
   x = 68,867,930,329/111,215.50
6. Step 6: Final answer
   x = 619,229.61