Finding the Fourth Proportional to 5,086.32, 7,019.16 and 2,990.48

Step by Step Solution

1. Step 1: Write the proportion equation
   5,086.32 : 7,019.16 = 2,990.48 : x
2. Step 2: Convert to fraction form
   5,086.32/7,019.16 = 2,990.48/x
3. Step 3: Cross multiply
   5,086.32x = 7,019.16 × 2,990.48
4. Step 4: Simplify right side
   5,086.32x = 20,990,657.60
5. Step 5: Solve for x
   x = 20,990,657.60/5,086.32
6. Step 6: Final answer
   x = 4,126.88