Finding the Fourth Proportional to 2,037.77, 2,811.05 and 1,290.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,037.77 : 2,811.05 = 1,290.41 : x
2. Step 2: Convert to fraction form
   2,037.77/2,811.05 = 1,290.41/x
3. Step 3: Cross multiply
   2,037.77x = 2,811.05 × 1,290.41
4. Step 4: Simplify right side
   2,037.77x = 3,627,407.03
5. Step 5: Solve for x
   x = 3,627,407.03/2,037.77
6. Step 6: Final answer
   x = 1,780.09