Finding the Third Proportional to 20,817 and 33,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,817 : 33,421.50 = 33,421.50 : x
2. Step 2: Convert to fraction form
   20,817/33,421.50 = 33,421.50/x
3. Step 3: Cross multiply
   20,817x = 33,421.50 × 33,421.50
4. Step 4: Simplify right side
   20,817x = 1,116,996,662.25
5. Step 5: Solve for x
   x = 1,116,996,662.25/20,817
6. Step 6: Final answer
   x = 53,657.91