Finding the Fourth Proportional to 1,694.78, 2,540.31 and 1,109.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,694.78 : 2,540.31 = 1,109.54 : x
2. Step 2: Convert to fraction form
   1,694.78/2,540.31 = 1,109.54/x
3. Step 3: Cross multiply
   1,694.78x = 2,540.31 × 1,109.54
4. Step 4: Simplify right side
   1,694.78x = 2,818,575.56
5. Step 5: Solve for x
   x = 2,818,575.56/1,694.78
6. Step 6: Final answer
   x = 1,663.09