Finding the Third Proportional to 11,687.50 and 18,800.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,687.50 : 18,800.50 = 18,800.50 : x
2. Step 2: Convert to fraction form
   11,687.50/18,800.50 = 18,800.50/x
3. Step 3: Cross multiply
   11,687.50x = 18,800.50 × 18,800.50
4. Step 4: Simplify right side
   11,687.50x = 353,458,800.25
5. Step 5: Solve for x
   x = 353,458,800.25/11,687.50
6. Step 6: Final answer
   x = 30,242.46