Finding the Third Proportional to 30,820.50 and 65,620.13

Step by Step Solution

1. Step 1: Write the proportion equation
   30,820.50 : 65,620.13 = 65,620.13 : x
2. Step 2: Convert to fraction form
   30,820.50/65,620.13 = 65,620.13/x
3. Step 3: Cross multiply
   30,820.50x = 65,620.13 × 65,620.13
4. Step 4: Simplify right side
   30,820.50x = 4,306,000,805.02
5. Step 5: Solve for x
   x = 4,306,000,805.02/30,820.50
6. Step 6: Final answer
   x = 139,712.23