Finding the Fourth Proportional to 2,186.18, 3,277.57 and 1,089.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.18 : 3,277.57 = 1,089.69 : x
2. Step 2: Convert to fraction form
   2,186.18/3,277.57 = 1,089.69/x
3. Step 3: Cross multiply
   2,186.18x = 3,277.57 × 1,089.69
4. Step 4: Simplify right side
   2,186.18x = 3,571,535.25
5. Step 5: Solve for x
   x = 3,571,535.25/2,186.18
6. Step 6: Final answer
   x = 1,633.69