Finding the Third Proportional to 111,663 and 243,401.63

Step by Step Solution

1. Step 1: Write the proportion equation
   111,663 : 243,401.63 = 243,401.63 : x
2. Step 2: Convert to fraction form
   111,663/243,401.63 = 243,401.63/x
3. Step 3: Cross multiply
   111,663x = 243,401.63 × 243,401.63
4. Step 4: Simplify right side
   111,663x = 59,244,351,052.64
5. Step 5: Solve for x
   x = 59,244,351,052.64/111,663
6. Step 6: Final answer
   x = 530,563.85