Finding the Fourth Proportional to 13,150.47, 18,147.65 and 7,182.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,150.47 : 18,147.65 = 7,182.15 : x
2. Step 2: Convert to fraction form
   13,150.47/18,147.65 = 7,182.15/x
3. Step 3: Cross multiply
   13,150.47x = 18,147.65 × 7,182.15
4. Step 4: Simplify right side
   13,150.47x = 130,339,142.56
5. Step 5: Solve for x
   x = 130,339,142.56/13,150.47
6. Step 6: Final answer
   x = 9,911.37