Finding the Third Proportional to 4,180.72 and 9,428.23

Step by Step Solution

1. Step 1: Write the proportion equation
   4,180.72 : 9,428.23 = 9,428.23 : x
2. Step 2: Convert to fraction form
   4,180.72/9,428.23 = 9,428.23/x
3. Step 3: Cross multiply
   4,180.72x = 9,428.23 × 9,428.23
4. Step 4: Simplify right side
   4,180.72x = 88,891,594.22
5. Step 5: Solve for x
   x = 88,891,594.22/4,180.72
6. Step 6: Final answer
   x = 21,262.29