Finding the Third Proportional to 111,990 and 243,662

Step by Step Solution

1. Step 1: Write the proportion equation
   111,990 : 243,662 = 243,662 : x
2. Step 2: Convert to fraction form
   111,990/243,662 = 243,662/x
3. Step 3: Cross multiply
   111,990x = 243,662 × 243,662
4. Step 4: Simplify right side
   111,990x = 59,371,170,244
5. Step 5: Solve for x
   x = 59,371,170,244/111,990
6. Step 6: Final answer
   x = 530,147.07