Finding the Fourth Proportional to 9,057.05, 12,498.72 and 5,280.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,057.05 : 12,498.72 = 5,280.38 : x
2. Step 2: Convert to fraction form
   9,057.05/12,498.72 = 5,280.38/x
3. Step 3: Cross multiply
   9,057.05x = 12,498.72 × 5,280.38
4. Step 4: Simplify right side
   9,057.05x = 65,997,928.62
5. Step 5: Solve for x
   x = 65,997,928.62/9,057.05
6. Step 6: Final answer
   x = 7,286.92