Finding the Fourth Proportional to 3,665.42, 5,498.79 and 1,200.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.42 : 5,498.79 = 1,200.36 : x
2. Step 2: Convert to fraction form
   3,665.42/5,498.79 = 1,200.36/x
3. Step 3: Cross multiply
   3,665.42x = 5,498.79 × 1,200.36
4. Step 4: Simplify right side
   3,665.42x = 6,600,527.56
5. Step 5: Solve for x
   x = 6,600,527.56/3,665.42
6. Step 6: Final answer
   x = 1,800.76