Finding the Third Proportional to 131,870 and 285,628

Step by Step Solution

1. Step 1: Write the proportion equation
   131,870 : 285,628 = 285,628 : x
2. Step 2: Convert to fraction form
   131,870/285,628 = 285,628/x
3. Step 3: Cross multiply
   131,870x = 285,628 × 285,628
4. Step 4: Simplify right side
   131,870x = 81,583,354,384
5. Step 5: Solve for x
   x = 81,583,354,384/131,870
6. Step 6: Final answer
   x = 618,665.01