Finding the Fourth Proportional to 9,756.41, 13,463.78 and 5,280.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,756.41 : 13,463.78 = 5,280.05 : x
2. Step 2: Convert to fraction form
   9,756.41/13,463.78 = 5,280.05/x
3. Step 3: Cross multiply
   9,756.41x = 13,463.78 × 5,280.05
4. Step 4: Simplify right side
   9,756.41x = 71,089,431.59
5. Step 5: Solve for x
   x = 71,089,431.59/9,756.41
6. Step 6: Final answer
   x = 7,286.43