Finding the Fourth Proportional to 2,012.78, 3,018.90 and 552.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.78 : 3,018.90 = 552.08 : x
2. Step 2: Convert to fraction form
   2,012.78/3,018.90 = 552.08/x
3. Step 3: Cross multiply
   2,012.78x = 3,018.90 × 552.08
4. Step 4: Simplify right side
   2,012.78x = 1,666,674.31
5. Step 5: Solve for x
   x = 1,666,674.31/2,012.78
6. Step 6: Final answer
   x = 828.05