Finding the Fourth Proportional to 8,436.27, 12,711.59 and 7,007.43

Step by Step Solution

1. Step 1: Write the proportion equation
   8,436.27 : 12,711.59 = 7,007.43 : x
2. Step 2: Convert to fraction form
   8,436.27/12,711.59 = 7,007.43/x
3. Step 3: Cross multiply
   8,436.27x = 12,711.59 × 7,007.43
4. Step 4: Simplify right side
   8,436.27x = 89,075,542.08
5. Step 5: Solve for x
   x = 89,075,542.08/8,436.27
6. Step 6: Final answer
   x = 10,558.64