Finding the Third Proportional to 9,378.28 and 20,143.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,378.28 : 20,143.69 = 20,143.69 : x
2. Step 2: Convert to fraction form
   9,378.28/20,143.69 = 20,143.69/x
3. Step 3: Cross multiply
   9,378.28x = 20,143.69 × 20,143.69
4. Step 4: Simplify right side
   9,378.28x = 405,768,146.10
5. Step 5: Solve for x
   x = 405,768,146.10/9,378.28
6. Step 6: Final answer
   x = 43,266.79