Finding the Third Proportional to 11,356.45 and 18,469.90

Step by Step Solution

1. Step 1: Write the proportion equation
   11,356.45 : 18,469.90 = 18,469.90 : x
2. Step 2: Convert to fraction form
   11,356.45/18,469.90 = 18,469.90/x
3. Step 3: Cross multiply
   11,356.45x = 18,469.90 × 18,469.90
4. Step 4: Simplify right side
   11,356.45x = 341,137,148.29
5. Step 5: Solve for x
   x = 341,137,148.29/11,356.45
6. Step 6: Final answer
   x = 30,039.06