Finding the Third Proportional to 7,455 and 12,124.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,455 : 12,124.50 = 12,124.50 : x
2. Step 2: Convert to fraction form
   7,455/12,124.50 = 12,124.50/x
3. Step 3: Cross multiply
   7,455x = 12,124.50 × 12,124.50
4. Step 4: Simplify right side
   7,455x = 147,003,500.25
5. Step 5: Solve for x
   x = 147,003,500.25/7,455
6. Step 6: Final answer
   x = 19,718.78