Finding the Fourth Proportional to 4,978.62, 6,871.25 and 2,990.27

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.62 : 6,871.25 = 2,990.27 : x
2. Step 2: Convert to fraction form
   4,978.62/6,871.25 = 2,990.27/x
3. Step 3: Cross multiply
   4,978.62x = 6,871.25 × 2,990.27
4. Step 4: Simplify right side
   4,978.62x = 20,546,843.43
5. Step 5: Solve for x
   x = 20,546,843.43/4,978.62
6. Step 6: Final answer
   x = 4,127.02