Finding the Fourth Proportional to 3,981.81, 5,973.36 and 1,208.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.81 : 5,973.36 = 1,208.15 : x
2. Step 2: Convert to fraction form
   3,981.81/5,973.36 = 1,208.15/x
3. Step 3: Cross multiply
   3,981.81x = 5,973.36 × 1,208.15
4. Step 4: Simplify right side
   3,981.81x = 7,216,714.88
5. Step 5: Solve for x
   x = 7,216,714.88/3,981.81
6. Step 6: Final answer
   x = 1,812.42