Finding the Fourth Proportional to 2,107.72, 3,162.38 and 1,866.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,107.72 : 3,162.38 = 1,866.32 : x
2. Step 2: Convert to fraction form
   2,107.72/3,162.38 = 1,866.32/x
3. Step 3: Cross multiply
   2,107.72x = 3,162.38 × 1,866.32
4. Step 4: Simplify right side
   2,107.72x = 5,902,013.04
5. Step 5: Solve for x
   x = 5,902,013.04/2,107.72
6. Step 6: Final answer
   x = 2,800.19