Finding the Third Proportional to 87,656 and 191,988

Step by Step Solution

1. Step 1: Write the proportion equation
   87,656 : 191,988 = 191,988 : x
2. Step 2: Convert to fraction form
   87,656/191,988 = 191,988/x
3. Step 3: Cross multiply
   87,656x = 191,988 × 191,988
4. Step 4: Simplify right side
   87,656x = 36,859,392,144
5. Step 5: Solve for x
   x = 36,859,392,144/87,656
6. Step 6: Final answer
   x = 420,500.50