Finding the Third Proportional to 12,150 and 15,525.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,150 : 15,525.50 = 15,525.50 : x
2. Step 2: Convert to fraction form
   12,150/15,525.50 = 15,525.50/x
3. Step 3: Cross multiply
   12,150x = 15,525.50 × 15,525.50
4. Step 4: Simplify right side
   12,150x = 241,041,150.25
5. Step 5: Solve for x
   x = 241,041,150.25/12,150
6. Step 6: Final answer
   x = 19,838.78