Finding the Fourth Proportional to 3,665.88, 5,499.68 and 1,200.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.88 : 5,499.68 = 1,200.69 : x
2. Step 2: Convert to fraction form
   3,665.88/5,499.68 = 1,200.69/x
3. Step 3: Cross multiply
   3,665.88x = 5,499.68 × 1,200.69
4. Step 4: Simplify right side
   3,665.88x = 6,603,410.78
5. Step 5: Solve for x
   x = 6,603,410.78/3,665.88
6. Step 6: Final answer
   x = 1,801.32