Finding the Fourth Proportional to 5,139.52, 7,704.72 and 2,218.24

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139.52 : 7,704.72 = 2,218.24 : x
2. Step 2: Convert to fraction form
   5,139.52/7,704.72 = 2,218.24/x
3. Step 3: Cross multiply
   5,139.52x = 7,704.72 × 2,218.24
4. Step 4: Simplify right side
   5,139.52x = 17,090,918.09
5. Step 5: Solve for x
   x = 17,090,918.09/5,139.52
6. Step 6: Final answer
   x = 3,325.39