Finding the Third Proportional to 13,142.25 and 20,921.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,142.25 : 20,921.25 = 20,921.25 : x
2. Step 2: Convert to fraction form
   13,142.25/20,921.25 = 20,921.25/x
3. Step 3: Cross multiply
   13,142.25x = 20,921.25 × 20,921.25
4. Step 4: Simplify right side
   13,142.25x = 437,698,701.56
5. Step 5: Solve for x
   x = 437,698,701.56/13,142.25
6. Step 6: Final answer
   x = 33,304.70