Finding the Third Proportional to 111,690 and 243,036

Step by Step Solution

1. Step 1: Write the proportion equation
   111,690 : 243,036 = 243,036 : x
2. Step 2: Convert to fraction form
   111,690/243,036 = 243,036/x
3. Step 3: Cross multiply
   111,690x = 243,036 × 243,036
4. Step 4: Simplify right side
   111,690x = 59,066,497,296
5. Step 5: Solve for x
   x = 59,066,497,296/111,690
6. Step 6: Final answer
   x = 528,843.20