Finding the Third Proportional to 140,872 and 284,048

Step by Step Solution

1. Step 1: Write the proportion equation
   140,872 : 284,048 = 284,048 : x
2. Step 2: Convert to fraction form
   140,872/284,048 = 284,048/x
3. Step 3: Cross multiply
   140,872x = 284,048 × 284,048
4. Step 4: Simplify right side
   140,872x = 80,683,266,304
5. Step 5: Solve for x
   x = 80,683,266,304/140,872
6. Step 6: Final answer
   x = 572,741.68