Finding the Third Proportional to 2,590.31 and 5,771.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.31 : 5,771.25 = 5,771.25 : x
2. Step 2: Convert to fraction form
   2,590.31/5,771.25 = 5,771.25/x
3. Step 3: Cross multiply
   2,590.31x = 5,771.25 × 5,771.25
4. Step 4: Simplify right side
   2,590.31x = 33,307,326.56
5. Step 5: Solve for x
   x = 33,307,326.56/2,590.31
6. Step 6: Final answer
   x = 12,858.42