Finding the Fourth Proportional to 1,997.06, 2,993.78 and 842.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997.06 : 2,993.78 = 842.18 : x
2. Step 2: Convert to fraction form
   1,997.06/2,993.78 = 842.18/x
3. Step 3: Cross multiply
   1,997.06x = 2,993.78 × 842.18
4. Step 4: Simplify right side
   1,997.06x = 2,521,301.64
5. Step 5: Solve for x
   x = 2,521,301.64/1,997.06
6. Step 6: Final answer
   x = 1,262.51