Finding the Third Proportional to 21,451.50 and 28,813.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,451.50 : 28,813.50 = 28,813.50 : x
2. Step 2: Convert to fraction form
   21,451.50/28,813.50 = 28,813.50/x
3. Step 3: Cross multiply
   21,451.50x = 28,813.50 × 28,813.50
4. Step 4: Simplify right side
   21,451.50x = 830,217,782.25
5. Step 5: Solve for x
   x = 830,217,782.25/21,451.50
6. Step 6: Final answer
   x = 38,702.09