Finding the Fourth Proportional to 3,669.89, 5,505.98 and 1,072.85

Step by Step Solution

1. Step 1: Write the proportion equation
   3,669.89 : 5,505.98 = 1,072.85 : x
2. Step 2: Convert to fraction form
   3,669.89/5,505.98 = 1,072.85/x
3. Step 3: Cross multiply
   3,669.89x = 5,505.98 × 1,072.85
4. Step 4: Simplify right side
   3,669.89x = 5,907,057.75
5. Step 5: Solve for x
   x = 5,907,057.75/3,669.89
6. Step 6: Final answer
   x = 1,609.60