Finding the Third Proportional to 111,315 and 262,512

Step by Step Solution

1. Step 1: Write the proportion equation
   111,315 : 262,512 = 262,512 : x
2. Step 2: Convert to fraction form
   111,315/262,512 = 262,512/x
3. Step 3: Cross multiply
   111,315x = 262,512 × 262,512
4. Step 4: Simplify right side
   111,315x = 68,912,550,144
5. Step 5: Solve for x
   x = 68,912,550,144/111,315
6. Step 6: Final answer
   x = 619,076.95