Finding the Fourth Proportional to 2,013.60, 3,017.73 and 1,089.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.60 : 3,017.73 = 1,089.39 : x
2. Step 2: Convert to fraction form
   2,013.60/3,017.73 = 1,089.39/x
3. Step 3: Cross multiply
   2,013.60x = 3,017.73 × 1,089.39
4. Step 4: Simplify right side
   2,013.60x = 3,287,484.88
5. Step 5: Solve for x
   x = 3,287,484.88/2,013.60
6. Step 6: Final answer
   x = 1,632.64