Finding the Fourth Proportional to 2,080.54, 3,118.78 and 1,691.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.54 : 3,118.78 = 1,691.34 : x
2. Step 2: Convert to fraction form
   2,080.54/3,118.78 = 1,691.34/x
3. Step 3: Cross multiply
   2,080.54x = 3,118.78 × 1,691.34
4. Step 4: Simplify right side
   2,080.54x = 5,274,917.37
5. Step 5: Solve for x
   x = 5,274,917.37/2,080.54
6. Step 6: Final answer
   x = 2,535.36