Finding the Fourth Proportional to 13,131.13, 18,120.98 and 7,162.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.13 : 18,120.98 = 7,162.82 : x
2. Step 2: Convert to fraction form
   13,131.13/18,120.98 = 7,162.82/x
3. Step 3: Cross multiply
   13,131.13x = 18,120.98 × 7,162.82
4. Step 4: Simplify right side
   13,131.13x = 129,797,317.96
5. Step 5: Solve for x
   x = 129,797,317.96/13,131.13
6. Step 6: Final answer
   x = 9,884.70