Finding the Third Proportional to 12,858.75 and 17,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,858.75 : 17,131.50 = 17,131.50 : x
2. Step 2: Convert to fraction form
   12,858.75/17,131.50 = 17,131.50/x
3. Step 3: Cross multiply
   12,858.75x = 17,131.50 × 17,131.50
4. Step 4: Simplify right side
   12,858.75x = 293,488,292.25
5. Step 5: Solve for x
   x = 293,488,292.25/12,858.75
6. Step 6: Final answer
   x = 22,824.01