Finding the Fourth Proportional to 4,990.38, 7,487.74 and 2,679.18

Step by Step Solution

1. Step 1: Write the proportion equation
   4,990.38 : 7,487.74 = 2,679.18 : x
2. Step 2: Convert to fraction form
   4,990.38/7,487.74 = 2,679.18/x
3. Step 3: Cross multiply
   4,990.38x = 7,487.74 × 2,679.18
4. Step 4: Simplify right side
   4,990.38x = 20,061,003.25
5. Step 5: Solve for x
   x = 20,061,003.25/4,990.38
6. Step 6: Final answer
   x = 4,019.94