Finding the Fourth Proportional to 13,149.63, 18,145.82 and 7,180.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,149.63 : 18,145.82 = 7,180.16 : x
2. Step 2: Convert to fraction form
   13,149.63/18,145.82 = 7,180.16/x
3. Step 3: Cross multiply
   13,149.63x = 18,145.82 × 7,180.16
4. Step 4: Simplify right side
   13,149.63x = 130,289,818.15
5. Step 5: Solve for x
   x = 130,289,818.15/13,149.63
6. Step 6: Final answer
   x = 9,908.25