Finding the Third Proportional to 18,928.69 and 39,816.56

Step by Step Solution

1. Step 1: Write the proportion equation
   18,928.69 : 39,816.56 = 39,816.56 : x
2. Step 2: Convert to fraction form
   18,928.69/39,816.56 = 39,816.56/x
3. Step 3: Cross multiply
   18,928.69x = 39,816.56 × 39,816.56
4. Step 4: Simplify right side
   18,928.69x = 1,585,358,649.32
5. Step 5: Solve for x
   x = 1,585,358,649.32/18,928.69
6. Step 6: Final answer
   x = 83,754.28