Finding the Fourth Proportional to 2,087.13, 2,880.51 and 2,018.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.13 : 2,880.51 = 2,018.76 : x
2. Step 2: Convert to fraction form
   2,087.13/2,880.51 = 2,018.76/x
3. Step 3: Cross multiply
   2,087.13x = 2,880.51 × 2,018.76
4. Step 4: Simplify right side
   2,087.13x = 5,815,058.37
5. Step 5: Solve for x
   x = 5,815,058.37/2,087.13
6. Step 6: Final answer
   x = 2,786.15