Finding the Fourth Proportional to 12,436.71, 17,164.20 and 7,131.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,436.71 : 17,164.20 = 7,131.43 : x
2. Step 2: Convert to fraction form
   12,436.71/17,164.20 = 7,131.43/x
3. Step 3: Cross multiply
   12,436.71x = 17,164.20 × 7,131.43
4. Step 4: Simplify right side
   12,436.71x = 122,405,290.81
5. Step 5: Solve for x
   x = 122,405,290.81/12,436.71
6. Step 6: Final answer
   x = 9,842.26