Finding the Fourth Proportional to 12,436.50, 17,162.37 and 7,131.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,436.50 : 17,162.37 = 7,131.09 : x
2. Step 2: Convert to fraction form
   12,436.50/17,162.37 = 7,131.09/x
3. Step 3: Cross multiply
   12,436.50x = 17,162.37 × 7,131.09
4. Step 4: Simplify right side
   12,436.50x = 122,386,405.08
5. Step 5: Solve for x
   x = 122,386,405.08/12,436.50
6. Step 6: Final answer
   x = 9,840.90