Finding the Third Proportional to 139,394 and 215,427

Step by Step Solution

1. Step 1: Write the proportion equation
   139,394 : 215,427 = 215,427 : x
2. Step 2: Convert to fraction form
   139,394/215,427 = 215,427/x
3. Step 3: Cross multiply
   139,394x = 215,427 × 215,427
4. Step 4: Simplify right side
   139,394x = 46,408,792,329
5. Step 5: Solve for x
   x = 46,408,792,329/139,394
6. Step 6: Final answer
   x = 332,932.50