Finding the Third Proportional to 21,091.50 and 28,381.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,091.50 : 28,381.50 = 28,381.50 : x
2. Step 2: Convert to fraction form
   21,091.50/28,381.50 = 28,381.50/x
3. Step 3: Cross multiply
   21,091.50x = 28,381.50 × 28,381.50
4. Step 4: Simplify right side
   21,091.50x = 805,509,542.25
5. Step 5: Solve for x
   x = 805,509,542.25/21,091.50
6. Step 6: Final answer
   x = 38,191.19