Finding the Fourth Proportional to 2,388.50, 3,582.65 and 1,089.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.50 : 3,582.65 = 1,089.95 : x
2. Step 2: Convert to fraction form
   2,388.50/3,582.65 = 1,089.95/x
3. Step 3: Cross multiply
   2,388.50x = 3,582.65 × 1,089.95
4. Step 4: Simplify right side
   2,388.50x = 3,904,886.00
5. Step 5: Solve for x
   x = 3,904,886.00/2,388.50
6. Step 6: Final answer
   x = 1,634.87