Finding the Fourth Proportional to 5,179.17, 7,147.33 and 2,821.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,179.17 : 7,147.33 = 2,821.31 : x
2. Step 2: Convert to fraction form
   5,179.17/7,147.33 = 2,821.31/x
3. Step 3: Cross multiply
   5,179.17x = 7,147.33 × 2,821.31
4. Step 4: Simplify right side
   5,179.17x = 20,164,833.60
5. Step 5: Solve for x
   x = 20,164,833.60/5,179.17
6. Step 6: Final answer
   x = 3,893.45