Finding the Third Proportional to 152,869.50 and 220,189

Step by Step Solution

1. Step 1: Write the proportion equation
   152,869.50 : 220,189 = 220,189 : x
2. Step 2: Convert to fraction form
   152,869.50/220,189 = 220,189/x
3. Step 3: Cross multiply
   152,869.50x = 220,189 × 220,189
4. Step 4: Simplify right side
   152,869.50x = 48,483,195,721
5. Step 5: Solve for x
   x = 48,483,195,721/152,869.50
6. Step 6: Final answer
   x = 317,154.15