Finding the Fourth Proportional to 9,139.56, 13,709.18 and 2,214.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.56 : 13,709.18 = 2,214.04 : x
2. Step 2: Convert to fraction form
   9,139.56/13,709.18 = 2,214.04/x
3. Step 3: Cross multiply
   9,139.56x = 13,709.18 × 2,214.04
4. Step 4: Simplify right side
   9,139.56x = 30,352,672.89
5. Step 5: Solve for x
   x = 30,352,672.89/9,139.56
6. Step 6: Final answer
   x = 3,321.02