Finding the Fourth Proportional to 2,018.73, 3,017.28 and 1,820.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.73 : 3,017.28 = 1,820.63 : x
2. Step 2: Convert to fraction form
   2,018.73/3,017.28 = 1,820.63/x
3. Step 3: Cross multiply
   2,018.73x = 3,017.28 × 1,820.63
4. Step 4: Simplify right side
   2,018.73x = 5,493,335.40
5. Step 5: Solve for x
   x = 5,493,335.40/2,018.73
6. Step 6: Final answer
   x = 2,721.18