Finding the Fourth Proportional to 1,997.10, 2,993.80 and 1,021.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997.10 : 2,993.80 = 1,021.05 : x
2. Step 2: Convert to fraction form
   1,997.10/2,993.80 = 1,021.05/x
3. Step 3: Cross multiply
   1,997.10x = 2,993.80 × 1,021.05
4. Step 4: Simplify right side
   1,997.10x = 3,056,819.49
5. Step 5: Solve for x
   x = 3,056,819.49/1,997.10
6. Step 6: Final answer
   x = 1,530.63