Finding the Fourth Proportional to 2,185, 3,278.56 and 1,089.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185 : 3,278.56 = 1,089.46 : x
2. Step 2: Convert to fraction form
   2,185/3,278.56 = 1,089.46/x
3. Step 3: Cross multiply
   2,185x = 3,278.56 × 1,089.46
4. Step 4: Simplify right side
   2,185x = 3,571,859.98
5. Step 5: Solve for x
   x = 3,571,859.98/2,185
6. Step 6: Final answer
   x = 1,634.72