Finding the Third Proportional to 70,780 and 99,162

Step by Step Solution

1. Step 1: Write the proportion equation
   70,780 : 99,162 = 99,162 : x
2. Step 2: Convert to fraction form
   70,780/99,162 = 99,162/x
3. Step 3: Cross multiply
   70,780x = 99,162 × 99,162
4. Step 4: Simplify right side
   70,780x = 9,833,102,244
5. Step 5: Solve for x
   x = 9,833,102,244/70,780
6. Step 6: Final answer
   x = 138,924.87