Finding the Fourth Proportional to 9,144.31, 13,716.34 and 2,218.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,144.31 : 13,716.34 = 2,218.87 : x
2. Step 2: Convert to fraction form
   9,144.31/13,716.34 = 2,218.87/x
3. Step 3: Cross multiply
   9,144.31x = 13,716.34 × 2,218.87
4. Step 4: Simplify right side
   9,144.31x = 30,434,775.34
5. Step 5: Solve for x
   x = 30,434,775.34/9,144.31
6. Step 6: Final answer
   x = 3,328.27