Finding the Third Proportional to 30,819 and 63,078

Step by Step Solution

1. Step 1: Write the proportion equation
   30,819 : 63,078 = 63,078 : x
2. Step 2: Convert to fraction form
   30,819/63,078 = 63,078/x
3. Step 3: Cross multiply
   30,819x = 63,078 × 63,078
4. Step 4: Simplify right side
   30,819x = 3,978,834,084
5. Step 5: Solve for x
   x = 3,978,834,084/30,819
6. Step 6: Final answer
   x = 129,103.28