Finding the Third Proportional to 100,789.50 and 209,868

Step by Step Solution

1. Step 1: Write the proportion equation
   100,789.50 : 209,868 = 209,868 : x
2. Step 2: Convert to fraction form
   100,789.50/209,868 = 209,868/x
3. Step 3: Cross multiply
   100,789.50x = 209,868 × 209,868
4. Step 4: Simplify right side
   100,789.50x = 44,044,577,424
5. Step 5: Solve for x
   x = 44,044,577,424/100,789.50
6. Step 6: Final answer
   x = 436,995.69