Finding the Fourth Proportional to 1,183.90, 1,784.72 and 1,104.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,183.90 : 1,784.72 = 1,104.61 : x
2. Step 2: Convert to fraction form
   1,183.90/1,784.72 = 1,104.61/x
3. Step 3: Cross multiply
   1,183.90x = 1,784.72 × 1,104.61
4. Step 4: Simplify right side
   1,183.90x = 1,971,419.56
5. Step 5: Solve for x
   x = 1,971,419.56/1,183.90
6. Step 6: Final answer
   x = 1,665.19