Finding the Third Proportional to 30,220 and 65,816.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,220 : 65,816.50 = 65,816.50 : x
2. Step 2: Convert to fraction form
   30,220/65,816.50 = 65,816.50/x
3. Step 3: Cross multiply
   30,220x = 65,816.50 × 65,816.50
4. Step 4: Simplify right side
   30,220x = 4,331,811,672.25
5. Step 5: Solve for x
   x = 4,331,811,672.25/30,220
6. Step 6: Final answer
   x = 143,342.54