Finding the Fourth Proportional to 9,318.56, 12,859.72 and 5,126.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,318.56 : 12,859.72 = 5,126.88 : x
2. Step 2: Convert to fraction form
   9,318.56/12,859.72 = 5,126.88/x
3. Step 3: Cross multiply
   9,318.56x = 12,859.72 × 5,126.88
4. Step 4: Simplify right side
   9,318.56x = 65,930,241.27
5. Step 5: Solve for x
   x = 65,930,241.27/9,318.56
6. Step 6: Final answer
   x = 7,075.15