Finding the Third Proportional to 87,471 and 139,250

Step by Step Solution

1. Step 1: Write the proportion equation
   87,471 : 139,250 = 139,250 : x
2. Step 2: Convert to fraction form
   87,471/139,250 = 139,250/x
3. Step 3: Cross multiply
   87,471x = 139,250 × 139,250
4. Step 4: Simplify right side
   87,471x = 19,390,562,500
5. Step 5: Solve for x
   x = 19,390,562,500/87,471
6. Step 6: Final answer
   x = 221,679.90