Finding the Third Proportional to 111,690 and 243,081

Step by Step Solution

1. Step 1: Write the proportion equation
   111,690 : 243,081 = 243,081 : x
2. Step 2: Convert to fraction form
   111,690/243,081 = 243,081/x
3. Step 3: Cross multiply
   111,690x = 243,081 × 243,081
4. Step 4: Simplify right side
   111,690x = 59,088,372,561
5. Step 5: Solve for x
   x = 59,088,372,561/111,690
6. Step 6: Final answer
   x = 529,039.06