Finding the Third Proportional to 20,860.50 and 38,440.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,860.50 : 38,440.50 = 38,440.50 : x
2. Step 2: Convert to fraction form
   20,860.50/38,440.50 = 38,440.50/x
3. Step 3: Cross multiply
   20,860.50x = 38,440.50 × 38,440.50
4. Step 4: Simplify right side
   20,860.50x = 1,477,672,040.25
5. Step 5: Solve for x
   x = 1,477,672,040.25/20,860.50
6. Step 6: Final answer
   x = 70,835.89