Finding the Third Proportional to 13,921.88 and 21,571.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,921.88 : 21,571.31 = 21,571.31 : x
2. Step 2: Convert to fraction form
   13,921.88/21,571.31 = 21,571.31/x
3. Step 3: Cross multiply
   13,921.88x = 21,571.31 × 21,571.31
4. Step 4: Simplify right side
   13,921.88x = 465,321,522.97
5. Step 5: Solve for x
   x = 465,321,522.97/13,921.88
6. Step 6: Final answer
   x = 33,423.77