Finding the Fourth Proportional to 2,081.68, 3,118.68 and 1,054.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.68 : 3,118.68 = 1,054.48 : x
2. Step 2: Convert to fraction form
   2,081.68/3,118.68 = 1,054.48/x
3. Step 3: Cross multiply
   2,081.68x = 3,118.68 × 1,054.48
4. Step 4: Simplify right side
   2,081.68x = 3,288,585.69
5. Step 5: Solve for x
   x = 3,288,585.69/2,081.68
6. Step 6: Final answer
   x = 1,579.77