Finding the Fourth Proportional to 2,076.89, 2,866.11 and 1,145.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.89 : 2,866.11 = 1,145.39 : x
2. Step 2: Convert to fraction form
   2,076.89/2,866.11 = 1,145.39/x
3. Step 3: Cross multiply
   2,076.89x = 2,866.11 × 1,145.39
4. Step 4: Simplify right side
   2,076.89x = 3,282,814.45
5. Step 5: Solve for x
   x = 3,282,814.45/2,076.89
6. Step 6: Final answer
   x = 1,580.64