Finding the Fourth Proportional to 7,022.21, 10,533.30 and 2,861.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,022.21 : 10,533.30 = 2,861.31 : x
2. Step 2: Convert to fraction form
   7,022.21/10,533.30 = 2,861.31/x
3. Step 3: Cross multiply
   7,022.21x = 10,533.30 × 2,861.31
4. Step 4: Simplify right side
   7,022.21x = 30,139,036.62
5. Step 5: Solve for x
   x = 30,139,036.62/7,022.21
6. Step 6: Final answer
   x = 4,291.96