Finding the Fourth Proportional to 3,981.48, 5,481.89 and 3,612.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.48 : 5,481.89 = 3,612.42 : x
2. Step 2: Convert to fraction form
   3,981.48/5,481.89 = 3,612.42/x
3. Step 3: Cross multiply
   3,981.48x = 5,481.89 × 3,612.42
4. Step 4: Simplify right side
   3,981.48x = 19,802,871.01
5. Step 5: Solve for x
   x = 19,802,871.01/3,981.48
6. Step 6: Final answer
   x = 4,973.75