Finding the Third Proportional to 87,640.50 and 191,866

Step by Step Solution

1. Step 1: Write the proportion equation
   87,640.50 : 191,866 = 191,866 : x
2. Step 2: Convert to fraction form
   87,640.50/191,866 = 191,866/x
3. Step 3: Cross multiply
   87,640.50x = 191,866 × 191,866
4. Step 4: Simplify right side
   87,640.50x = 36,812,561,956
5. Step 5: Solve for x
   x = 36,812,561,956/87,640.50
6. Step 6: Final answer
   x = 420,040.53