Finding the Third Proportional to 20,817 and 28,633.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,817 : 28,633.50 = 28,633.50 : x
2. Step 2: Convert to fraction form
   20,817/28,633.50 = 28,633.50/x
3. Step 3: Cross multiply
   20,817x = 28,633.50 × 28,633.50
4. Step 4: Simplify right side
   20,817x = 819,877,322.25
5. Step 5: Solve for x
   x = 819,877,322.25/20,817
6. Step 6: Final answer
   x = 39,384.99