Finding the Fourth Proportional to 2,580.32, 3,867.82 and 1,018.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580.32 : 3,867.82 = 1,018.20 : x
2. Step 2: Convert to fraction form
   2,580.32/3,867.82 = 1,018.20/x
3. Step 3: Cross multiply
   2,580.32x = 3,867.82 × 1,018.20
4. Step 4: Simplify right side
   2,580.32x = 3,938,214.32
5. Step 5: Solve for x
   x = 3,938,214.32/2,580.32
6. Step 6: Final answer
   x = 1,526.25