Finding the Third Proportional to 18,686.50 and 39,795.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,686.50 : 39,795.50 = 39,795.50 : x
2. Step 2: Convert to fraction form
   18,686.50/39,795.50 = 39,795.50/x
3. Step 3: Cross multiply
   18,686.50x = 39,795.50 × 39,795.50
4. Step 4: Simplify right side
   18,686.50x = 1,583,681,820.25
5. Step 5: Solve for x
   x = 1,583,681,820.25/18,686.50
6. Step 6: Final answer
   x = 84,750.05