Finding the Fourth Proportional to 13,160.72, 18,162.67 and 7,419.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,160.72 : 18,162.67 = 7,419.59 : x
2. Step 2: Convert to fraction form
   13,160.72/18,162.67 = 7,419.59/x
3. Step 3: Cross multiply
   13,160.72x = 18,162.67 × 7,419.59
4. Step 4: Simplify right side
   13,160.72x = 134,759,546.16
5. Step 5: Solve for x
   x = 134,759,546.16/13,160.72
6. Step 6: Final answer
   x = 10,239.53