Finding the Third Proportional to 63,508 and 139,470

Step by Step Solution

1. Step 1: Write the proportion equation
   63,508 : 139,470 = 139,470 : x
2. Step 2: Convert to fraction form
   63,508/139,470 = 139,470/x
3. Step 3: Cross multiply
   63,508x = 139,470 × 139,470
4. Step 4: Simplify right side
   63,508x = 19,451,880,900
5. Step 5: Solve for x
   x = 19,451,880,900/63,508
6. Step 6: Final answer
   x = 306,290.25