Finding the Fourth Proportional to 2,011.91, 3,017.86 and 551.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,011.91 : 3,017.86 = 551.06 : x
2. Step 2: Convert to fraction form
   2,011.91/3,017.86 = 551.06/x
3. Step 3: Cross multiply
   2,011.91x = 3,017.86 × 551.06
4. Step 4: Simplify right side
   2,011.91x = 1,663,021.93
5. Step 5: Solve for x
   x = 1,663,021.93/2,011.91
6. Step 6: Final answer
   x = 826.59