Finding the Fourth Proportional to 5,280.69, 7,280.72 and 3,388.93

Step by Step Solution

1. Step 1: Write the proportion equation
   5,280.69 : 7,280.72 = 3,388.93 : x
2. Step 2: Convert to fraction form
   5,280.69/7,280.72 = 3,388.93/x
3. Step 3: Cross multiply
   5,280.69x = 7,280.72 × 3,388.93
4. Step 4: Simplify right side
   5,280.69x = 24,673,850.43
5. Step 5: Solve for x
   x = 24,673,850.43/5,280.69
6. Step 6: Final answer
   x = 4,672.47