Finding the Third Proportional to 91,990.69 and 143,020.69

Step by Step Solution

1. Step 1: Write the proportion equation
   91,990.69 : 143,020.69 = 143,020.69 : x
2. Step 2: Convert to fraction form
   91,990.69/143,020.69 = 143,020.69/x
3. Step 3: Cross multiply
   91,990.69x = 143,020.69 × 143,020.69
4. Step 4: Simplify right side
   91,990.69x = 20,454,917,052.97
5. Step 5: Solve for x
   x = 20,454,917,052.97/91,990.69
6. Step 6: Final answer
   x = 222,358.56