Finding the Third Proportional to 87,636 and 191,288

Step by Step Solution

1. Step 1: Write the proportion equation
   87,636 : 191,288 = 191,288 : x
2. Step 2: Convert to fraction form
   87,636/191,288 = 191,288/x
3. Step 3: Cross multiply
   87,636x = 191,288 × 191,288
4. Step 4: Simplify right side
   87,636x = 36,591,098,944
5. Step 5: Solve for x
   x = 36,591,098,944/87,636
6. Step 6: Final answer
   x = 417,535.02