Finding the Fourth Proportional to 3,665.82, 5,499.22 and 1,200

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.82 : 5,499.22 = 1,200 : x
2. Step 2: Convert to fraction form
   3,665.82/5,499.22 = 1,200/x
3. Step 3: Cross multiply
   3,665.82x = 5,499.22 × 1,200
4. Step 4: Simplify right side
   3,665.82x = 6,599,064
5. Step 5: Solve for x
   x = 6,599,064/3,665.82
6. Step 6: Final answer
   x = 1,800.16