Finding the Third Proportional to 49,891 and 78,986

Step by Step Solution

1. Step 1: Write the proportion equation
   49,891 : 78,986 = 78,986 : x
2. Step 2: Convert to fraction form
   49,891/78,986 = 78,986/x
3. Step 3: Cross multiply
   49,891x = 78,986 × 78,986
4. Step 4: Simplify right side
   49,891x = 6,238,788,196
5. Step 5: Solve for x
   x = 6,238,788,196/49,891
6. Step 6: Final answer
   x = 125,048.37