Finding the Third Proportional to 139,298 and 208,950

Step by Step Solution

1. Step 1: Write the proportion equation
   139,298 : 208,950 = 208,950 : x
2. Step 2: Convert to fraction form
   139,298/208,950 = 208,950/x
3. Step 3: Cross multiply
   139,298x = 208,950 × 208,950
4. Step 4: Simplify right side
   139,298x = 43,660,102,500
5. Step 5: Solve for x
   x = 43,660,102,500/139,298
6. Step 6: Final answer
   x = 313,429.50