Finding the Fourth Proportional to 13,148.24, 18,144.72 and 7,180.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,148.24 : 18,144.72 = 7,180.16 : x
2. Step 2: Convert to fraction form
   13,148.24/18,144.72 = 7,180.16/x
3. Step 3: Cross multiply
   13,148.24x = 18,144.72 × 7,180.16
4. Step 4: Simplify right side
   13,148.24x = 130,281,992.76
5. Step 5: Solve for x
   x = 130,281,992.76/13,148.24
6. Step 6: Final answer
   x = 9,908.70