Finding the Fourth Proportional to 3,911.78, 5,867.72 and 1,314.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,911.78 : 5,867.72 = 1,314.72 : x
2. Step 2: Convert to fraction form
   3,911.78/5,867.72 = 1,314.72/x
3. Step 3: Cross multiply
   3,911.78x = 5,867.72 × 1,314.72
4. Step 4: Simplify right side
   3,911.78x = 7,714,408.84
5. Step 5: Solve for x
   x = 7,714,408.84/3,911.78
6. Step 6: Final answer
   x = 1,972.10