Finding the Third Proportional to 7,986.38 and 12,090.38

Step by Step Solution

1. Step 1: Write the proportion equation
   7,986.38 : 12,090.38 = 12,090.38 : x
2. Step 2: Convert to fraction form
   7,986.38/12,090.38 = 12,090.38/x
3. Step 3: Cross multiply
   7,986.38x = 12,090.38 × 12,090.38
4. Step 4: Simplify right side
   7,986.38x = 146,177,167.64
5. Step 5: Solve for x
   x = 146,177,167.64/7,986.38
6. Step 6: Final answer
   x = 18,303.32