Finding the Fourth Proportional to 2,018.35, 2,784.12 and 1,231.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.35 : 2,784.12 = 1,231.03 : x
2. Step 2: Convert to fraction form
   2,018.35/2,784.12 = 1,231.03/x
3. Step 3: Cross multiply
   2,018.35x = 2,784.12 × 1,231.03
4. Step 4: Simplify right side
   2,018.35x = 3,427,341.03
5. Step 5: Solve for x
   x = 3,427,341.03/2,018.35
6. Step 6: Final answer
   x = 1,698.09