Finding the Fourth Proportional to 2,011.89, 2,992.32 and 1,990.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,011.89 : 2,992.32 = 1,990.02 : x
2. Step 2: Convert to fraction form
   2,011.89/2,992.32 = 1,990.02/x
3. Step 3: Cross multiply
   2,011.89x = 2,992.32 × 1,990.02
4. Step 4: Simplify right side
   2,011.89x = 5,954,765.44
5. Step 5: Solve for x
   x = 5,954,765.44/2,011.89
6. Step 6: Final answer
   x = 2,959.79