Finding the Third Proportional to 3,656.25 and 7,920.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,656.25 : 7,920.38 = 7,920.38 : x
2. Step 2: Convert to fraction form
   3,656.25/7,920.38 = 7,920.38/x
3. Step 3: Cross multiply
   3,656.25x = 7,920.38 × 7,920.38
4. Step 4: Simplify right side
   3,656.25x = 62,732,340.14
5. Step 5: Solve for x
   x = 62,732,340.14/3,656.25
6. Step 6: Final answer
   x = 17,157.56