Finding the Third Proportional to 16,858.50 and 18,694.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,858.50 : 18,694.50 = 18,694.50 : x
2. Step 2: Convert to fraction form
   16,858.50/18,694.50 = 18,694.50/x
3. Step 3: Cross multiply
   16,858.50x = 18,694.50 × 18,694.50
4. Step 4: Simplify right side
   16,858.50x = 349,484,330.25
5. Step 5: Solve for x
   x = 349,484,330.25/16,858.50
6. Step 6: Final answer
   x = 20,730.45