Finding the Fourth Proportional to 13,149, 18,145.89 and 7,180.92

Step by Step Solution

1. Step 1: Write the proportion equation
   13,149 : 18,145.89 = 7,180.92 : x
2. Step 2: Convert to fraction form
   13,149/18,145.89 = 7,180.92/x
3. Step 3: Cross multiply
   13,149x = 18,145.89 × 7,180.92
4. Step 4: Simplify right side
   13,149x = 130,304,184.42
5. Step 5: Solve for x
   x = 130,304,184.42/13,149
6. Step 6: Final answer
   x = 9,909.82