Finding the Fourth Proportional to 1,411.94, 2,117.89 and 578.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.94 : 2,117.89 = 578.83 : x
2. Step 2: Convert to fraction form
   1,411.94/2,117.89 = 578.83/x
3. Step 3: Cross multiply
   1,411.94x = 2,117.89 × 578.83
4. Step 4: Simplify right side
   1,411.94x = 1,225,884.79
5. Step 5: Solve for x
   x = 1,225,884.79/1,411.94
6. Step 6: Final answer
   x = 868.23