Finding the Fourth Proportional to 7,123.20, 9,826.56 and 5,022.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,123.20 : 9,826.56 = 5,022.72 : x
2. Step 2: Convert to fraction form
   7,123.20/9,826.56 = 5,022.72/x
3. Step 3: Cross multiply
   7,123.20x = 9,826.56 × 5,022.72
4. Step 4: Simplify right side
   7,123.20x = 49,356,059.44
5. Step 5: Solve for x
   x = 49,356,059.44/7,123.20
6. Step 6: Final answer
   x = 6,928.92