Finding the Third Proportional to 16,947 and 21,865.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,947 : 21,865.50 = 21,865.50 : x
2. Step 2: Convert to fraction form
   16,947/21,865.50 = 21,865.50/x
3. Step 3: Cross multiply
   16,947x = 21,865.50 × 21,865.50
4. Step 4: Simplify right side
   16,947x = 478,100,090.25
5. Step 5: Solve for x
   x = 478,100,090.25/16,947
6. Step 6: Final answer
   x = 28,211.49