Finding the Third Proportional to 13,911.25 and 20,862.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,911.25 : 20,862.88 = 20,862.88 : x
2. Step 2: Convert to fraction form
   13,911.25/20,862.88 = 20,862.88/x
3. Step 3: Cross multiply
   13,911.25x = 20,862.88 × 20,862.88
4. Step 4: Simplify right side
   13,911.25x = 435,259,553.27
5. Step 5: Solve for x
   x = 435,259,553.27/13,911.25
6. Step 6: Final answer
   x = 31,288.31