Finding the Third Proportional to 3,925.69 and 9,259.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,925.69 : 9,259.31 = 9,259.31 : x
2. Step 2: Convert to fraction form
   3,925.69/9,259.31 = 9,259.31/x
3. Step 3: Cross multiply
   3,925.69x = 9,259.31 × 9,259.31
4. Step 4: Simplify right side
   3,925.69x = 85,734,867.97
5. Step 5: Solve for x
   x = 85,734,867.97/3,925.69
6. Step 6: Final answer
   x = 21,839.45