Finding the Third Proportional to 111,220 and 231,655

Step by Step Solution

1. Step 1: Write the proportion equation
   111,220 : 231,655 = 231,655 : x
2. Step 2: Convert to fraction form
   111,220/231,655 = 231,655/x
3. Step 3: Cross multiply
   111,220x = 231,655 × 231,655
4. Step 4: Simplify right side
   111,220x = 53,664,039,025
5. Step 5: Solve for x
   x = 53,664,039,025/111,220
6. Step 6: Final answer
   x = 482,503.50