Finding the Fourth Proportional to 1,899.98, 2,831.86 and 1,863.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.98 : 2,831.86 = 1,863.54 : x
2. Step 2: Convert to fraction form
   1,899.98/2,831.86 = 1,863.54/x
3. Step 3: Cross multiply
   1,899.98x = 2,831.86 × 1,863.54
4. Step 4: Simplify right side
   1,899.98x = 5,277,284.38
5. Step 5: Solve for x
   x = 5,277,284.38/1,899.98
6. Step 6: Final answer
   x = 2,777.55