Finding the Third Proportional to 21,721.88 and 33,580.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,721.88 : 33,580.50 = 33,580.50 : x
2. Step 2: Convert to fraction form
   21,721.88/33,580.50 = 33,580.50/x
3. Step 3: Cross multiply
   21,721.88x = 33,580.50 × 33,580.50
4. Step 4: Simplify right side
   21,721.88x = 1,127,649,980.25
5. Step 5: Solve for x
   x = 1,127,649,980.25/21,721.88
6. Step 6: Final answer
   x = 51,913.11