Finding the Fourth Proportional to 2,991.56, 4,478.82 and 1,992.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,991.56 : 4,478.82 = 1,992.42 : x
2. Step 2: Convert to fraction form
   2,991.56/4,478.82 = 1,992.42/x
3. Step 3: Cross multiply
   2,991.56x = 4,478.82 × 1,992.42
4. Step 4: Simplify right side
   2,991.56x = 8,923,690.54
5. Step 5: Solve for x
   x = 8,923,690.54/2,991.56
6. Step 6: Final answer
   x = 2,982.96