Finding the Third Proportional to 72,987 and 109,806

Step by Step Solution

1. Step 1: Write the proportion equation
   72,987 : 109,806 = 109,806 : x
2. Step 2: Convert to fraction form
   72,987/109,806 = 109,806/x
3. Step 3: Cross multiply
   72,987x = 109,806 × 109,806
4. Step 4: Simplify right side
   72,987x = 12,057,357,636
5. Step 5: Solve for x
   x = 12,057,357,636/72,987
6. Step 6: Final answer
   x = 165,198.70