Finding the Third Proportional to 12,155 and 15,532.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,155 : 15,532.50 = 15,532.50 : x
2. Step 2: Convert to fraction form
   12,155/15,532.50 = 15,532.50/x
3. Step 3: Cross multiply
   12,155x = 15,532.50 × 15,532.50
4. Step 4: Simplify right side
   12,155x = 241,258,556.25
5. Step 5: Solve for x
   x = 241,258,556.25/12,155
6. Step 6: Final answer
   x = 19,848.50