Finding the Third Proportional to 16,903.69 and 39,138.19

Step by Step Solution

1. Step 1: Write the proportion equation
   16,903.69 : 39,138.19 = 39,138.19 : x
2. Step 2: Convert to fraction form
   16,903.69/39,138.19 = 39,138.19/x
3. Step 3: Cross multiply
   16,903.69x = 39,138.19 × 39,138.19
4. Step 4: Simplify right side
   16,903.69x = 1,531,797,720.79
5. Step 5: Solve for x
   x = 1,531,797,720.79/16,903.69
6. Step 6: Final answer
   x = 90,619.15