Finding the Third Proportional to 30,696 and 63,120

Step by Step Solution

1. Step 1: Write the proportion equation
   30,696 : 63,120 = 63,120 : x
2. Step 2: Convert to fraction form
   30,696/63,120 = 63,120/x
3. Step 3: Cross multiply
   30,696x = 63,120 × 63,120
4. Step 4: Simplify right side
   30,696x = 3,984,134,400
5. Step 5: Solve for x
   x = 3,984,134,400/30,696
6. Step 6: Final answer
   x = 129,793.28