Finding the Fourth Proportional to 2,635.74, 3,958.47 and 2,091.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.74 : 3,958.47 = 2,091.42 : x
2. Step 2: Convert to fraction form
   2,635.74/3,958.47 = 2,091.42/x
3. Step 3: Cross multiply
   2,635.74x = 3,958.47 × 2,091.42
4. Step 4: Simplify right side
   2,635.74x = 8,278,823.33
5. Step 5: Solve for x
   x = 8,278,823.33/2,635.74
6. Step 6: Final answer
   x = 3,140.99