Finding the Third Proportional to 11,947.50 and 18,513.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,947.50 : 18,513.56 = 18,513.56 : x
2. Step 2: Convert to fraction form
   11,947.50/18,513.56 = 18,513.56/x
3. Step 3: Cross multiply
   11,947.50x = 18,513.56 × 18,513.56
4. Step 4: Simplify right side
   11,947.50x = 342,751,996.44
5. Step 5: Solve for x
   x = 342,751,996.44/11,947.50
6. Step 6: Final answer
   x = 28,688.18