Finding the Third Proportional to 139,682 and 216,242

Step by Step Solution

1. Step 1: Write the proportion equation
   139,682 : 216,242 = 216,242 : x
2. Step 2: Convert to fraction form
   139,682/216,242 = 216,242/x
3. Step 3: Cross multiply
   139,682x = 216,242 × 216,242
4. Step 4: Simplify right side
   139,682x = 46,760,602,564
5. Step 5: Solve for x
   x = 46,760,602,564/139,682
6. Step 6: Final answer
   x = 334,764.70