Finding the Third Proportional to 30,308.50 and 64,829

Step by Step Solution

1. Step 1: Write the proportion equation
   30,308.50 : 64,829 = 64,829 : x
2. Step 2: Convert to fraction form
   30,308.50/64,829 = 64,829/x
3. Step 3: Cross multiply
   30,308.50x = 64,829 × 64,829
4. Step 4: Simplify right side
   30,308.50x = 4,202,799,241
5. Step 5: Solve for x
   x = 4,202,799,241/30,308.50
6. Step 6: Final answer
   x = 138,667.35