Finding the Fourth Proportional to 2,012.72, 3,018.61 and 551.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.72 : 3,018.61 = 551.99 : x
2. Step 2: Convert to fraction form
   2,012.72/3,018.61 = 551.99/x
3. Step 3: Cross multiply
   2,012.72x = 3,018.61 × 551.99
4. Step 4: Simplify right side
   2,012.72x = 1,666,226.06
5. Step 5: Solve for x
   x = 1,666,226.06/2,012.72
6. Step 6: Final answer
   x = 827.85