Finding the Third Proportional to 139,262 and 285,898

Step by Step Solution

1. Step 1: Write the proportion equation
   139,262 : 285,898 = 285,898 : x
2. Step 2: Convert to fraction form
   139,262/285,898 = 285,898/x
3. Step 3: Cross multiply
   139,262x = 285,898 × 285,898
4. Step 4: Simplify right side
   139,262x = 81,737,666,404
5. Step 5: Solve for x
   x = 81,737,666,404/139,262
6. Step 6: Final answer
   x = 586,934.46