Finding the Fourth Proportional to 7,404.96, 10,215.36 and 5,280.96

Step by Step Solution

1. Step 1: Write the proportion equation
   7,404.96 : 10,215.36 = 5,280.96 : x
2. Step 2: Convert to fraction form
   7,404.96/10,215.36 = 5,280.96/x
3. Step 3: Cross multiply
   7,404.96x = 10,215.36 × 5,280.96
4. Step 4: Simplify right side
   7,404.96x = 53,946,907.55
5. Step 5: Solve for x
   x = 53,946,907.55/7,404.96
6. Step 6: Final answer
   x = 7,285.24