Finding the Fourth Proportional to 2,993.40, 4,499.70 and 2,820.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,993.40 : 4,499.70 = 2,820.60 : x
2. Step 2: Convert to fraction form
   2,993.40/4,499.70 = 2,820.60/x
3. Step 3: Cross multiply
   2,993.40x = 4,499.70 × 2,820.60
4. Step 4: Simplify right side
   2,993.40x = 12,691,853.82
5. Step 5: Solve for x
   x = 12,691,853.82/2,993.40
6. Step 6: Final answer
   x = 4,239.95