Finding the Third Proportional to 9,123.89 and 12,131.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.89 : 12,131.02 = 12,131.02 : x
2. Step 2: Convert to fraction form
   9,123.89/12,131.02 = 12,131.02/x
3. Step 3: Cross multiply
   9,123.89x = 12,131.02 × 12,131.02
4. Step 4: Simplify right side
   9,123.89x = 147,161,540.09
5. Step 5: Solve for x
   x = 147,161,540.09/9,123.89
6. Step 6: Final answer
   x = 16,129.25