Finding the Fourth Proportional to 2,018.80, 3,021.72 and 1,043.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.80 : 3,021.72 = 1,043.56 : x
2. Step 2: Convert to fraction form
   2,018.80/3,021.72 = 1,043.56/x
3. Step 3: Cross multiply
   2,018.80x = 3,021.72 × 1,043.56
4. Step 4: Simplify right side
   2,018.80x = 3,153,346.12
5. Step 5: Solve for x
   x = 3,153,346.12/2,018.80
6. Step 6: Final answer
   x = 1,561.99