Finding the Fourth Proportional to 3,994.57, 5,512.91 and 2,315.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,994.57 : 5,512.91 = 2,315.89 : x
2. Step 2: Convert to fraction form
   3,994.57/5,512.91 = 2,315.89/x
3. Step 3: Cross multiply
   3,994.57x = 5,512.91 × 2,315.89
4. Step 4: Simplify right side
   3,994.57x = 12,767,301.48
5. Step 5: Solve for x
   x = 12,767,301.48/3,994.57
6. Step 6: Final answer
   x = 3,196.17