Finding the Fourth Proportional to 2,116.94, 3,175.88 and 818.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.94 : 3,175.88 = 818.51 : x
2. Step 2: Convert to fraction form
   2,116.94/3,175.88 = 818.51/x
3. Step 3: Cross multiply
   2,116.94x = 3,175.88 × 818.51
4. Step 4: Simplify right side
   2,116.94x = 2,599,469.57
5. Step 5: Solve for x
   x = 2,599,469.57/2,116.94
6. Step 6: Final answer
   x = 1,227.94