Finding the Third Proportional to 8,400.50 and 12,357.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,400.50 : 12,357.38 = 12,357.38 : x
2. Step 2: Convert to fraction form
   8,400.50/12,357.38 = 12,357.38/x
3. Step 3: Cross multiply
   8,400.50x = 12,357.38 × 12,357.38
4. Step 4: Simplify right side
   8,400.50x = 152,704,716.89
5. Step 5: Solve for x
   x = 152,704,716.89/8,400.50
6. Step 6: Final answer
   x = 18,178.05