Finding the Third Proportional to 50,078 and 70,009

Step by Step Solution

1. Step 1: Write the proportion equation
   50,078 : 70,009 = 70,009 : x
2. Step 2: Convert to fraction form
   50,078/70,009 = 70,009/x
3. Step 3: Cross multiply
   50,078x = 70,009 × 70,009
4. Step 4: Simplify right side
   50,078x = 4,901,260,081
5. Step 5: Solve for x
   x = 4,901,260,081/50,078
6. Step 6: Final answer
   x = 97,872.52