Finding the Fourth Proportional to 2,012.18, 3,017.90 and 550.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.18 : 3,017.90 = 550.98 : x
2. Step 2: Convert to fraction form
   2,012.18/3,017.90 = 550.98/x
3. Step 3: Cross multiply
   2,012.18x = 3,017.90 × 550.98
4. Step 4: Simplify right side
   2,012.18x = 1,662,802.54
5. Step 5: Solve for x
   x = 1,662,802.54/2,012.18
6. Step 6: Final answer
   x = 826.37