Finding the Third Proportional to 139,259 and 285,892

Step by Step Solution

1. Step 1: Write the proportion equation
   139,259 : 285,892 = 285,892 : x
2. Step 2: Convert to fraction form
   139,259/285,892 = 285,892/x
3. Step 3: Cross multiply
   139,259x = 285,892 × 285,892
4. Step 4: Simplify right side
   139,259x = 81,734,235,664
5. Step 5: Solve for x
   x = 81,734,235,664/139,259
6. Step 6: Final answer
   x = 586,922.47