Finding the Fourth Proportional to 2,076.58, 2,866.17 and 1,290.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.58 : 2,866.17 = 1,290.16 : x
2. Step 2: Convert to fraction form
   2,076.58/2,866.17 = 1,290.16/x
3. Step 3: Cross multiply
   2,076.58x = 2,866.17 × 1,290.16
4. Step 4: Simplify right side
   2,076.58x = 3,697,817.89
5. Step 5: Solve for x
   x = 3,697,817.89/2,076.58
6. Step 6: Final answer
   x = 1,780.72