Finding the Third Proportional to 9,143.25 and 12,256.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,143.25 : 12,256.88 = 12,256.88 : x
2. Step 2: Convert to fraction form
   9,143.25/12,256.88 = 12,256.88/x
3. Step 3: Cross multiply
   9,143.25x = 12,256.88 × 12,256.88
4. Step 4: Simplify right side
   9,143.25x = 150,230,984.77
5. Step 5: Solve for x
   x = 150,230,984.77/9,143.25
6. Step 6: Final answer
   x = 16,430.81