Finding the Fourth Proportional to 2,840.00, 3,919.17 and 1,581.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,840.00 : 3,919.17 = 1,581.15 : x
2. Step 2: Convert to fraction form
   2,840.00/3,919.17 = 1,581.15/x
3. Step 3: Cross multiply
   2,840.00x = 3,919.17 × 1,581.15
4. Step 4: Simplify right side
   2,840.00x = 6,196,795.65
5. Step 5: Solve for x
   x = 6,196,795.65/2,840.00
6. Step 6: Final answer
   x = 2,181.97