Finding the Third Proportional to 111,818 and 243,320

Step by Step Solution

1. Step 1: Write the proportion equation
   111,818 : 243,320 = 243,320 : x
2. Step 2: Convert to fraction form
   111,818/243,320 = 243,320/x
3. Step 3: Cross multiply
   111,818x = 243,320 × 243,320
4. Step 4: Simplify right side
   111,818x = 59,204,622,400
5. Step 5: Solve for x
   x = 59,204,622,400/111,818
6. Step 6: Final answer
   x = 529,473.09