Finding the Third Proportional to 18,862.50 and 39,790.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,862.50 : 39,790.50 = 39,790.50 : x
2. Step 2: Convert to fraction form
   18,862.50/39,790.50 = 39,790.50/x
3. Step 3: Cross multiply
   18,862.50x = 39,790.50 × 39,790.50
4. Step 4: Simplify right side
   18,862.50x = 1,583,283,890.25
5. Step 5: Solve for x
   x = 1,583,283,890.25/18,862.50
6. Step 6: Final answer
   x = 83,938.18