Finding the Third Proportional to 18,103.50 and 39,123

Step by Step Solution

1. Step 1: Write the proportion equation
   18,103.50 : 39,123 = 39,123 : x
2. Step 2: Convert to fraction form
   18,103.50/39,123 = 39,123/x
3. Step 3: Cross multiply
   18,103.50x = 39,123 × 39,123
4. Step 4: Simplify right side
   18,103.50x = 1,530,609,129
5. Step 5: Solve for x
   x = 1,530,609,129/18,103.50
6. Step 6: Final answer
   x = 84,547.69