Finding the Third Proportional to 12,155 and 15,530.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,155 : 15,530.25 = 15,530.25 : x
2. Step 2: Convert to fraction form
   12,155/15,530.25 = 15,530.25/x
3. Step 3: Cross multiply
   12,155x = 15,530.25 × 15,530.25
4. Step 4: Simplify right side
   12,155x = 241,188,665.06
5. Step 5: Solve for x
   x = 241,188,665.06/12,155
6. Step 6: Final answer
   x = 19,842.75