Finding the Third Proportional to 111,746 and 243,172

Step by Step Solution

1. Step 1: Write the proportion equation
   111,746 : 243,172 = 243,172 : x
2. Step 2: Convert to fraction form
   111,746/243,172 = 243,172/x
3. Step 3: Cross multiply
   111,746x = 243,172 × 243,172
4. Step 4: Simplify right side
   111,746x = 59,132,621,584
5. Step 5: Solve for x
   x = 59,132,621,584/111,746
6. Step 6: Final answer
   x = 529,169.92