Finding the Third Proportional to 139,862 and 215,103

Step by Step Solution

1. Step 1: Write the proportion equation
   139,862 : 215,103 = 215,103 : x
2. Step 2: Convert to fraction form
   139,862/215,103 = 215,103/x
3. Step 3: Cross multiply
   139,862x = 215,103 × 215,103
4. Step 4: Simplify right side
   139,862x = 46,269,300,609
5. Step 5: Solve for x
   x = 46,269,300,609/139,862
6. Step 6: Final answer
   x = 330,821.10