Finding the Fourth Proportional to 2,013.36, 2,761.90 and 1,928.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.36 : 2,761.90 = 1,928.31 : x
2. Step 2: Convert to fraction form
   2,013.36/2,761.90 = 1,928.31/x
3. Step 3: Cross multiply
   2,013.36x = 2,761.90 × 1,928.31
4. Step 4: Simplify right side
   2,013.36x = 5,325,784.21
5. Step 5: Solve for x
   x = 5,325,784.21/2,013.36
6. Step 6: Final answer
   x = 2,645.23