Finding the Fourth Proportional to 2,985.57, 4,478.46 and 794.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,985.57 : 4,478.46 = 794.31 : x
2. Step 2: Convert to fraction form
   2,985.57/4,478.46 = 794.31/x
3. Step 3: Cross multiply
   2,985.57x = 4,478.46 × 794.31
4. Step 4: Simplify right side
   2,985.57x = 3,557,285.56
5. Step 5: Solve for x
   x = 3,557,285.56/2,985.57
6. Step 6: Final answer
   x = 1,191.49