Finding the Third Proportional to 30,920.91 and 67,396.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,920.91 : 67,396.50 = 67,396.50 : x
2. Step 2: Convert to fraction form
   30,920.91/67,396.50 = 67,396.50/x
3. Step 3: Cross multiply
   30,920.91x = 67,396.50 × 67,396.50
4. Step 4: Simplify right side
   30,920.91x = 4,542,288,212.25
5. Step 5: Solve for x
   x = 4,542,288,212.25/30,920.91
6. Step 6: Final answer
   x = 146,900.23