Finding the Fourth Proportional to 2,111.76, 3,167.36 and 551.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.76 : 3,167.36 = 551.87 : x
2. Step 2: Convert to fraction form
   2,111.76/3,167.36 = 551.87/x
3. Step 3: Cross multiply
   2,111.76x = 3,167.36 × 551.87
4. Step 4: Simplify right side
   2,111.76x = 1,747,952.37
5. Step 5: Solve for x
   x = 1,747,952.37/2,111.76
6. Step 6: Final answer
   x = 827.72