Finding the Fourth Proportional to 5,086.80, 7,019.46 and 2,990.52

Step by Step Solution

1. Step 1: Write the proportion equation
   5,086.80 : 7,019.46 = 2,990.52 : x
2. Step 2: Convert to fraction form
   5,086.80/7,019.46 = 2,990.52/x
3. Step 3: Cross multiply
   5,086.80x = 7,019.46 × 2,990.52
4. Step 4: Simplify right side
   5,086.80x = 20,991,835.52
5. Step 5: Solve for x
   x = 20,991,835.52/5,086.80
6. Step 6: Final answer
   x = 4,126.73