Finding the Third Proportional to 111,068 and 216,600

Step by Step Solution

1. Step 1: Write the proportion equation
   111,068 : 216,600 = 216,600 : x
2. Step 2: Convert to fraction form
   111,068/216,600 = 216,600/x
3. Step 3: Cross multiply
   111,068x = 216,600 × 216,600
4. Step 4: Simplify right side
   111,068x = 46,915,560,000
5. Step 5: Solve for x
   x = 46,915,560,000/111,068
6. Step 6: Final answer
   x = 422,403.93