Finding the Fourth Proportional to 3,983.88, 5,975.69 and 1,212.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,983.88 : 5,975.69 = 1,212.47 : x
2. Step 2: Convert to fraction form
   3,983.88/5,975.69 = 1,212.47/x
3. Step 3: Cross multiply
   3,983.88x = 5,975.69 × 1,212.47
4. Step 4: Simplify right side
   3,983.88x = 7,245,308.91
5. Step 5: Solve for x
   x = 7,245,308.91/3,983.88
6. Step 6: Final answer
   x = 1,818.66