Finding the Fourth Proportional to 8,265.55, 11,400.80 and 5,280.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,265.55 : 11,400.80 = 5,280.06 : x
2. Step 2: Convert to fraction form
   8,265.55/11,400.80 = 5,280.06/x
3. Step 3: Cross multiply
   8,265.55x = 11,400.80 × 5,280.06
4. Step 4: Simplify right side
   8,265.55x = 60,196,838.89
5. Step 5: Solve for x
   x = 60,196,838.89/8,265.55
6. Step 6: Final answer
   x = 7,282.86