Finding the Third Proportional to 49,455 and 78,630

Step by Step Solution

1. Step 1: Write the proportion equation
   49,455 : 78,630 = 78,630 : x
2. Step 2: Convert to fraction form
   49,455/78,630 = 78,630/x
3. Step 3: Cross multiply
   49,455x = 78,630 × 78,630
4. Step 4: Simplify right side
   49,455x = 6,182,676,900
5. Step 5: Solve for x
   x = 6,182,676,900/49,455
6. Step 6: Final answer
   x = 125,016.21