Finding the Fourth Proportional to 2,993.42, 4,490.52 and 2,811.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,993.42 : 4,490.52 = 2,811.20 : x
2. Step 2: Convert to fraction form
   2,993.42/4,490.52 = 2,811.20/x
3. Step 3: Cross multiply
   2,993.42x = 4,490.52 × 2,811.20
4. Step 4: Simplify right side
   2,993.42x = 12,623,749.82
5. Step 5: Solve for x
   x = 12,623,749.82/2,993.42
6. Step 6: Final answer
   x = 4,217.17