Finding the Fourth Proportional to 2,111.40, 3,167.10 and 551.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.40 : 3,167.10 = 551.30 : x
2. Step 2: Convert to fraction form
   2,111.40/3,167.10 = 551.30/x
3. Step 3: Cross multiply
   2,111.40x = 3,167.10 × 551.30
4. Step 4: Simplify right side
   2,111.40x = 1,746,022.23
5. Step 5: Solve for x
   x = 1,746,022.23/2,111.40
6. Step 6: Final answer
   x = 826.95