Finding the Third Proportional to 30,620 and 63,168

Step by Step Solution

1. Step 1: Write the proportion equation
   30,620 : 63,168 = 63,168 : x
2. Step 2: Convert to fraction form
   30,620/63,168 = 63,168/x
3. Step 3: Cross multiply
   30,620x = 63,168 × 63,168
4. Step 4: Simplify right side
   30,620x = 3,990,196,224
5. Step 5: Solve for x
   x = 3,990,196,224/30,620
6. Step 6: Final answer
   x = 130,313.40