Finding the Fourth Proportional to 12,090.12, 16,686.20 and 7,377.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,090.12 : 16,686.20 = 7,377.14 : x
2. Step 2: Convert to fraction form
   12,090.12/16,686.20 = 7,377.14/x
3. Step 3: Cross multiply
   12,090.12x = 16,686.20 × 7,377.14
4. Step 4: Simplify right side
   12,090.12x = 123,096,433.47
5. Step 5: Solve for x
   x = 123,096,433.47/12,090.12
6. Step 6: Final answer
   x = 10,181.57