Finding the Third Proportional to 12,555 and 21,370.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,555 : 21,370.50 = 21,370.50 : x
2. Step 2: Convert to fraction form
   12,555/21,370.50 = 21,370.50/x
3. Step 3: Cross multiply
   12,555x = 21,370.50 × 21,370.50
4. Step 4: Simplify right side
   12,555x = 456,698,270.25
5. Step 5: Solve for x
   x = 456,698,270.25/12,555
6. Step 6: Final answer
   x = 36,375.81