Finding the Fourth Proportional to 2,111.97, 3,170.83 and 1,188.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.97 : 3,170.83 = 1,188.18 : x
2. Step 2: Convert to fraction form
   2,111.97/3,170.83 = 1,188.18/x
3. Step 3: Cross multiply
   2,111.97x = 3,170.83 × 1,188.18
4. Step 4: Simplify right side
   2,111.97x = 3,767,512.08
5. Step 5: Solve for x
   x = 3,767,512.08/2,111.97
6. Step 6: Final answer
   x = 1,783.88