Finding the Third Proportional to 111,215 and 231,646

Step by Step Solution

1. Step 1: Write the proportion equation
   111,215 : 231,646 = 231,646 : x
2. Step 2: Convert to fraction form
   111,215/231,646 = 231,646/x
3. Step 3: Cross multiply
   111,215x = 231,646 × 231,646
4. Step 4: Simplify right side
   111,215x = 53,659,869,316
5. Step 5: Solve for x
   x = 53,659,869,316/111,215
6. Step 6: Final answer
   x = 482,487.70