Finding the Fourth Proportional to 2,111.16, 3,166.77 and 551.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.16 : 3,166.77 = 551.07 : x
2. Step 2: Convert to fraction form
   2,111.16/3,166.77 = 551.07/x
3. Step 3: Cross multiply
   2,111.16x = 3,166.77 × 551.07
4. Step 4: Simplify right side
   2,111.16x = 1,745,096.11
5. Step 5: Solve for x
   x = 1,745,096.11/2,111.16
6. Step 6: Final answer
   x = 826.61