Finding the Third Proportional to 30,909.38 and 67,480.88

Step by Step Solution

1. Step 1: Write the proportion equation
   30,909.38 : 67,480.88 = 67,480.88 : x
2. Step 2: Convert to fraction form
   30,909.38/67,480.88 = 67,480.88/x
3. Step 3: Cross multiply
   30,909.38x = 67,480.88 × 67,480.88
4. Step 4: Simplify right side
   30,909.38x = 4,553,668,490.77
5. Step 5: Solve for x
   x = 4,553,668,490.77/30,909.38
6. Step 6: Final answer
   x = 147,323.21