Finding the Fourth Proportional to 2,725.74, 4,086.18 and 1,994.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,725.74 : 4,086.18 = 1,994.31 : x
2. Step 2: Convert to fraction form
   2,725.74/4,086.18 = 1,994.31/x
3. Step 3: Cross multiply
   2,725.74x = 4,086.18 × 1,994.31
4. Step 4: Simplify right side
   2,725.74x = 8,149,109.64
5. Step 5: Solve for x
   x = 8,149,109.64/2,725.74
6. Step 6: Final answer
   x = 2,989.69