Finding the Fourth Proportional to 2,789.33, 4,178.81 and 1,997.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,789.33 : 4,178.81 = 1,997.05 : x
2. Step 2: Convert to fraction form
   2,789.33/4,178.81 = 1,997.05/x
3. Step 3: Cross multiply
   2,789.33x = 4,178.81 × 1,997.05
4. Step 4: Simplify right side
   2,789.33x = 8,345,292.51
5. Step 5: Solve for x
   x = 8,345,292.51/2,789.33
6. Step 6: Final answer
   x = 2,991.87