Finding the Fourth Proportional to 2,111.22, 3,166.74 and 551.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.22 : 3,166.74 = 551.25 : x
2. Step 2: Convert to fraction form
   2,111.22/3,166.74 = 551.25/x
3. Step 3: Cross multiply
   2,111.22x = 3,166.74 × 551.25
4. Step 4: Simplify right side
   2,111.22x = 1,745,665.43
5. Step 5: Solve for x
   x = 1,745,665.43/2,111.22
6. Step 6: Final answer
   x = 826.85