Finding the Fourth Proportional to 3,892.05, 5,813.24 and 3,521.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.05 : 5,813.24 = 3,521.28 : x
2. Step 2: Convert to fraction form
   3,892.05/5,813.24 = 3,521.28/x
3. Step 3: Cross multiply
   3,892.05x = 5,813.24 × 3,521.28
4. Step 4: Simplify right side
   3,892.05x = 20,470,043.65
5. Step 5: Solve for x
   x = 20,470,043.65/3,892.05
6. Step 6: Final answer
   x = 5,259.46