Finding the Third Proportional to 28,609.50 and 60,909

Step by Step Solution

1. Step 1: Write the proportion equation
   28,609.50 : 60,909 = 60,909 : x
2. Step 2: Convert to fraction form
   28,609.50/60,909 = 60,909/x
3. Step 3: Cross multiply
   28,609.50x = 60,909 × 60,909
4. Step 4: Simplify right side
   28,609.50x = 3,709,906,281
5. Step 5: Solve for x
   x = 3,709,906,281/28,609.50
6. Step 6: Final answer
   x = 129,673.93