Finding the Fourth Proportional to 13,150.62, 18,147.36 and 7,842.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,150.62 : 18,147.36 = 7,842.69 : x
2. Step 2: Convert to fraction form
   13,150.62/18,147.36 = 7,842.69/x
3. Step 3: Cross multiply
   13,150.62x = 18,147.36 × 7,842.69
4. Step 4: Simplify right side
   13,150.62x = 142,324,118.80
5. Step 5: Solve for x
   x = 142,324,118.80/13,150.62
6. Step 6: Final answer
   x = 10,822.62