Finding the Third Proportional to 139,396 and 216,150

Step by Step Solution

1. Step 1: Write the proportion equation
   139,396 : 216,150 = 216,150 : x
2. Step 2: Convert to fraction form
   139,396/216,150 = 216,150/x
3. Step 3: Cross multiply
   139,396x = 216,150 × 216,150
4. Step 4: Simplify right side
   139,396x = 46,720,822,500
5. Step 5: Solve for x
   x = 46,720,822,500/139,396
6. Step 6: Final answer
   x = 335,166.16