Finding the Fourth Proportional to 3,520.16, 4,857.12 and 2,123

Step by Step Solution

1. Step 1: Write the proportion equation
   3,520.16 : 4,857.12 = 2,123 : x
2. Step 2: Convert to fraction form
   3,520.16/4,857.12 = 2,123/x
3. Step 3: Cross multiply
   3,520.16x = 4,857.12 × 2,123
4. Step 4: Simplify right side
   3,520.16x = 10,311,665.76
5. Step 5: Solve for x
   x = 10,311,665.76/3,520.16
6. Step 6: Final answer
   x = 2,929.32