Finding the Third Proportional to 30,628.50 and 64,929

Step by Step Solution

1. Step 1: Write the proportion equation
   30,628.50 : 64,929 = 64,929 : x
2. Step 2: Convert to fraction form
   30,628.50/64,929 = 64,929/x
3. Step 3: Cross multiply
   30,628.50x = 64,929 × 64,929
4. Step 4: Simplify right side
   30,628.50x = 4,215,775,041
5. Step 5: Solve for x
   x = 4,215,775,041/30,628.50
6. Step 6: Final answer
   x = 137,642.23