Finding the Fourth Proportional to 5,179.33, 7,147.40 and 2,821.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,179.33 : 7,147.40 = 2,821.42 : x
2. Step 2: Convert to fraction form
   5,179.33/7,147.40 = 2,821.42/x
3. Step 3: Cross multiply
   5,179.33x = 7,147.40 × 2,821.42
4. Step 4: Simplify right side
   5,179.33x = 20,165,817.31
5. Step 5: Solve for x
   x = 20,165,817.31/5,179.33
6. Step 6: Final answer
   x = 3,893.52