Finding the Fourth Proportional to 1,045.86, 1,443.31 and 573.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.86 : 1,443.31 = 573.78 : x
2. Step 2: Convert to fraction form
   1,045.86/1,443.31 = 573.78/x
3. Step 3: Cross multiply
   1,045.86x = 1,443.31 × 573.78
4. Step 4: Simplify right side
   1,045.86x = 828,145.97
5. Step 5: Solve for x
   x = 828,145.97/1,045.86
6. Step 6: Final answer
   x = 791.83