Finding the Fourth Proportional to 2,017.98, 2,785.76 and 1,355.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.98 : 2,785.76 = 1,355.30 : x
2. Step 2: Convert to fraction form
   2,017.98/2,785.76 = 1,355.30/x
3. Step 3: Cross multiply
   2,017.98x = 2,785.76 × 1,355.30
4. Step 4: Simplify right side
   2,017.98x = 3,775,535.35
5. Step 5: Solve for x
   x = 3,775,535.35/2,017.98
6. Step 6: Final answer
   x = 1,870.95