Finding the Third Proportional to 50,402 and 78,891

Step by Step Solution

1. Step 1: Write the proportion equation
   50,402 : 78,891 = 78,891 : x
2. Step 2: Convert to fraction form
   50,402/78,891 = 78,891/x
3. Step 3: Cross multiply
   50,402x = 78,891 × 78,891
4. Step 4: Simplify right side
   50,402x = 6,223,789,881
5. Step 5: Solve for x
   x = 6,223,789,881/50,402
6. Step 6: Final answer
   x = 123,482.99