Finding the Fourth Proportional to 3,666.21, 5,499.68 and 1,069.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,666.21 : 5,499.68 = 1,069.17 : x
2. Step 2: Convert to fraction form
   3,666.21/5,499.68 = 1,069.17/x
3. Step 3: Cross multiply
   3,666.21x = 5,499.68 × 1,069.17
4. Step 4: Simplify right side
   3,666.21x = 5,880,087.52
5. Step 5: Solve for x
   x = 5,880,087.52/3,666.21
6. Step 6: Final answer
   x = 1,603.86