Finding the Fourth Proportional to 3,728.30, 5,589.06 and 1,421.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,728.30 : 5,589.06 = 1,421.42 : x
2. Step 2: Convert to fraction form
   3,728.30/5,589.06 = 1,421.42/x
3. Step 3: Cross multiply
   3,728.30x = 5,589.06 × 1,421.42
4. Step 4: Simplify right side
   3,728.30x = 7,944,401.67
5. Step 5: Solve for x
   x = 7,944,401.67/3,728.30
6. Step 6: Final answer
   x = 2,130.84