Finding the Fourth Proportional to 2,013.71, 2,778.67 and 1,174.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.71 : 2,778.67 = 1,174.31 : x
2. Step 2: Convert to fraction form
   2,013.71/2,778.67 = 1,174.31/x
3. Step 3: Cross multiply
   2,013.71x = 2,778.67 × 1,174.31
4. Step 4: Simplify right side
   2,013.71x = 3,263,017.96
5. Step 5: Solve for x
   x = 3,263,017.96/2,013.71
6. Step 6: Final answer
   x = 1,620.41