Finding the Third Proportional to 30,305.50 and 64,499

Step by Step Solution

1. Step 1: Write the proportion equation
   30,305.50 : 64,499 = 64,499 : x
2. Step 2: Convert to fraction form
   30,305.50/64,499 = 64,499/x
3. Step 3: Cross multiply
   30,305.50x = 64,499 × 64,499
4. Step 4: Simplify right side
   30,305.50x = 4,160,121,001
5. Step 5: Solve for x
   x = 4,160,121,001/30,305.50
6. Step 6: Final answer
   x = 137,272.81