Finding the Third Proportional to 111,686 and 243,070

Step by Step Solution

1. Step 1: Write the proportion equation
   111,686 : 243,070 = 243,070 : x
2. Step 2: Convert to fraction form
   111,686/243,070 = 243,070/x
3. Step 3: Cross multiply
   111,686x = 243,070 × 243,070
4. Step 4: Simplify right side
   111,686x = 59,083,024,900
5. Step 5: Solve for x
   x = 59,083,024,900/111,686
6. Step 6: Final answer
   x = 529,010.13