Finding the Third Proportional to 111,772 and 243,272

Step by Step Solution

1. Step 1: Write the proportion equation
   111,772 : 243,272 = 243,272 : x
2. Step 2: Convert to fraction form
   111,772/243,272 = 243,272/x
3. Step 3: Cross multiply
   111,772x = 243,272 × 243,272
4. Step 4: Simplify right side
   111,772x = 59,181,265,984
5. Step 5: Solve for x
   x = 59,181,265,984/111,772
6. Step 6: Final answer
   x = 529,482.03