Finding the Fourth Proportional to 1,807.78, 2,708.83 and 1,076.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.78 : 2,708.83 = 1,076.96 : x
2. Step 2: Convert to fraction form
   1,807.78/2,708.83 = 1,076.96/x
3. Step 3: Cross multiply
   1,807.78x = 2,708.83 × 1,076.96
4. Step 4: Simplify right side
   1,807.78x = 2,917,301.56
5. Step 5: Solve for x
   x = 2,917,301.56/1,807.78
6. Step 6: Final answer
   x = 1,613.75