Finding the Third Proportional to 139,857 and 215,095

Step by Step Solution

1. Step 1: Write the proportion equation
   139,857 : 215,095 = 215,095 : x
2. Step 2: Convert to fraction form
   139,857/215,095 = 215,095/x
3. Step 3: Cross multiply
   139,857x = 215,095 × 215,095
4. Step 4: Simplify right side
   139,857x = 46,265,859,025
5. Step 5: Solve for x
   x = 46,265,859,025/139,857
6. Step 6: Final answer
   x = 330,808.32