Finding the Third Proportional to 3,979.13 and 9,127.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,979.13 : 9,127.69 = 9,127.69 : x
2. Step 2: Convert to fraction form
   3,979.13/9,127.69 = 9,127.69/x
3. Step 3: Cross multiply
   3,979.13x = 9,127.69 × 9,127.69
4. Step 4: Simplify right side
   3,979.13x = 83,314,679.10
5. Step 5: Solve for x
   x = 83,314,679.10/3,979.13
6. Step 6: Final answer
   x = 20,937.94