Finding the Third Proportional to 30,270.50 and 65,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,270.50 : 65,990.50 = 65,990.50 : x
2. Step 2: Convert to fraction form
   30,270.50/65,990.50 = 65,990.50/x
3. Step 3: Cross multiply
   30,270.50x = 65,990.50 × 65,990.50
4. Step 4: Simplify right side
   30,270.50x = 4,354,746,090.25
5. Step 5: Solve for x
   x = 4,354,746,090.25/30,270.50
6. Step 6: Final answer
   x = 143,861.06