Finding the Fourth Proportional to 1,104.84, 1,656.78 and 411.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.84 : 1,656.78 = 411.39 : x
2. Step 2: Convert to fraction form
   1,104.84/1,656.78 = 411.39/x
3. Step 3: Cross multiply
   1,104.84x = 1,656.78 × 411.39
4. Step 4: Simplify right side
   1,104.84x = 681,582.72
5. Step 5: Solve for x
   x = 681,582.72/1,104.84
6. Step 6: Final answer
   x = 616.91