Finding the Fourth Proportional to 2,018.64, 2,784.74 and 1,231.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.64 : 2,784.74 = 1,231.32 : x
2. Step 2: Convert to fraction form
   2,018.64/2,784.74 = 1,231.32/x
3. Step 3: Cross multiply
   2,018.64x = 2,784.74 × 1,231.32
4. Step 4: Simplify right side
   2,018.64x = 3,428,899.90
5. Step 5: Solve for x
   x = 3,428,899.90/2,018.64
6. Step 6: Final answer
   x = 1,698.62