Finding the Third Proportional to 91,990.69 and 123,621.19

Step by Step Solution

1. Step 1: Write the proportion equation
   91,990.69 : 123,621.19 = 123,621.19 : x
2. Step 2: Convert to fraction form
   91,990.69/123,621.19 = 123,621.19/x
3. Step 3: Cross multiply
   91,990.69x = 123,621.19 × 123,621.19
4. Step 4: Simplify right side
   91,990.69x = 15,282,197,998.91
5. Step 5: Solve for x
   x = 15,282,197,998.91/91,990.69
6. Step 6: Final answer
   x = 166,127.66