Finding the Fourth Proportional to 9,012, 12,436.56 and 5,286.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,012 : 12,436.56 = 5,286.72 : x
2. Step 2: Convert to fraction form
   9,012/12,436.56 = 5,286.72/x
3. Step 3: Cross multiply
   9,012x = 12,436.56 × 5,286.72
4. Step 4: Simplify right side
   9,012x = 65,748,610.48
5. Step 5: Solve for x
   x = 65,748,610.48/9,012
6. Step 6: Final answer
   x = 7,295.67