Finding the Fourth Proportional to 3,990.98, 5,990.15 and 2,018.00

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990.98 : 5,990.15 = 2,018.00 : x
2. Step 2: Convert to fraction form
   3,990.98/5,990.15 = 2,018.00/x
3. Step 3: Cross multiply
   3,990.98x = 5,990.15 × 2,018.00
4. Step 4: Simplify right side
   3,990.98x = 12,088,097.79
5. Step 5: Solve for x
   x = 12,088,097.79/3,990.98
6. Step 6: Final answer
   x = 3,028.86