Finding the Fourth Proportional to 5,280.10, 7,917.59 and 2,158.87

Step by Step Solution

1. Step 1: Write the proportion equation
   5,280.10 : 7,917.59 = 2,158.87 : x
2. Step 2: Convert to fraction form
   5,280.10/7,917.59 = 2,158.87/x
3. Step 3: Cross multiply
   5,280.10x = 7,917.59 × 2,158.87
4. Step 4: Simplify right side
   5,280.10x = 17,093,007.94
5. Step 5: Solve for x
   x = 17,093,007.94/5,280.10
6. Step 6: Final answer
   x = 3,237.25