Finding the Third Proportional to 87,756 and 139,495

Step by Step Solution

1. Step 1: Write the proportion equation
   87,756 : 139,495 = 139,495 : x
2. Step 2: Convert to fraction form
   87,756/139,495 = 139,495/x
3. Step 3: Cross multiply
   87,756x = 139,495 × 139,495
4. Step 4: Simplify right side
   87,756x = 19,458,855,025
5. Step 5: Solve for x
   x = 19,458,855,025/87,756
6. Step 6: Final answer
   x = 221,738.17