Finding the Third Proportional to 111,690 and 243,461

Step by Step Solution

1. Step 1: Write the proportion equation
   111,690 : 243,461 = 243,461 : x
2. Step 2: Convert to fraction form
   111,690/243,461 = 243,461/x
3. Step 3: Cross multiply
   111,690x = 243,461 × 243,461
4. Step 4: Simplify right side
   111,690x = 59,273,258,521
5. Step 5: Solve for x
   x = 59,273,258,521/111,690
6. Step 6: Final answer
   x = 530,694.41