Finding the Fourth Proportional to 2,111.10, 3,166.86 and 551.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.10 : 3,166.86 = 551.34 : x
2. Step 2: Convert to fraction form
   2,111.10/3,166.86 = 551.34/x
3. Step 3: Cross multiply
   2,111.10x = 3,166.86 × 551.34
4. Step 4: Simplify right side
   2,111.10x = 1,746,016.59
5. Step 5: Solve for x
   x = 1,746,016.59/2,111.10
6. Step 6: Final answer
   x = 827.06