Finding the Fourth Proportional to 3,666.15, 5,499.38 and 1,069.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,666.15 : 5,499.38 = 1,069.09 : x
2. Step 2: Convert to fraction form
   3,666.15/5,499.38 = 1,069.09/x
3. Step 3: Cross multiply
   3,666.15x = 5,499.38 × 1,069.09
4. Step 4: Simplify right side
   3,666.15x = 5,879,332.16
5. Step 5: Solve for x
   x = 5,879,332.16/3,666.15
6. Step 6: Final answer
   x = 1,603.68