Finding the Third Proportional to 7,155 and 12,433.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,155 : 12,433.50 = 12,433.50 : x
2. Step 2: Convert to fraction form
   7,155/12,433.50 = 12,433.50/x
3. Step 3: Cross multiply
   7,155x = 12,433.50 × 12,433.50
4. Step 4: Simplify right side
   7,155x = 154,591,922.25
5. Step 5: Solve for x
   x = 154,591,922.25/7,155
6. Step 6: Final answer
   x = 21,606.14