Finding the Fourth Proportional to 9,756.78, 13,464.24 and 5,280.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,756.78 : 13,464.24 = 5,280.43 : x
2. Step 2: Convert to fraction form
   9,756.78/13,464.24 = 5,280.43/x
3. Step 3: Cross multiply
   9,756.78x = 13,464.24 × 5,280.43
4. Step 4: Simplify right side
   9,756.78x = 71,096,909.50
5. Step 5: Solve for x
   x = 71,096,909.50/9,756.78
6. Step 6: Final answer
   x = 7,286.92