Finding the Third Proportional to 18,346.50 and 19,986.75

Step by Step Solution

1. Step 1: Write the proportion equation
   18,346.50 : 19,986.75 = 19,986.75 : x
2. Step 2: Convert to fraction form
   18,346.50/19,986.75 = 19,986.75/x
3. Step 3: Cross multiply
   18,346.50x = 19,986.75 × 19,986.75
4. Step 4: Simplify right side
   18,346.50x = 399,470,175.56
5. Step 5: Solve for x
   x = 399,470,175.56/18,346.50
6. Step 6: Final answer
   x = 21,773.64