Finding the Third Proportional to 139,514 and 208,722

Step by Step Solution

1. Step 1: Write the proportion equation
   139,514 : 208,722 = 208,722 : x
2. Step 2: Convert to fraction form
   139,514/208,722 = 208,722/x
3. Step 3: Cross multiply
   139,514x = 208,722 × 208,722
4. Step 4: Simplify right side
   139,514x = 43,564,873,284
5. Step 5: Solve for x
   x = 43,564,873,284/139,514
6. Step 6: Final answer
   x = 312,261.66