Finding the Fourth Proportional to 6,621.55, 9,128.81 and 5,673.24

Step by Step Solution

1. Step 1: Write the proportion equation
   6,621.55 : 9,128.81 = 5,673.24 : x
2. Step 2: Convert to fraction form
   6,621.55/9,128.81 = 5,673.24/x
3. Step 3: Cross multiply
   6,621.55x = 9,128.81 × 5,673.24
4. Step 4: Simplify right side
   6,621.55x = 51,789,930.04
5. Step 5: Solve for x
   x = 51,789,930.04/6,621.55
6. Step 6: Final answer
   x = 7,821.42