Finding the Fourth Proportional to 3,666.39, 5,499.78 and 1,069.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,666.39 : 5,499.78 = 1,069.53 : x
2. Step 2: Convert to fraction form
   3,666.39/5,499.78 = 1,069.53/x
3. Step 3: Cross multiply
   3,666.39x = 5,499.78 × 1,069.53
4. Step 4: Simplify right side
   3,666.39x = 5,882,179.70
5. Step 5: Solve for x
   x = 5,882,179.70/3,666.39
6. Step 6: Final answer
   x = 1,604.35