Finding the Third Proportional to 87,641.50 and 191,868

Step by Step Solution

1. Step 1: Write the proportion equation
   87,641.50 : 191,868 = 191,868 : x
2. Step 2: Convert to fraction form
   87,641.50/191,868 = 191,868/x
3. Step 3: Cross multiply
   87,641.50x = 191,868 × 191,868
4. Step 4: Simplify right side
   87,641.50x = 36,813,329,424
5. Step 5: Solve for x
   x = 36,813,329,424/87,641.50
6. Step 6: Final answer
   x = 420,044.49