Finding the Fourth Proportional to 4,667.35, 6,440.36 and 3,158.21

Step by Step Solution

1. Step 1: Write the proportion equation
   4,667.35 : 6,440.36 = 3,158.21 : x
2. Step 2: Convert to fraction form
   4,667.35/6,440.36 = 3,158.21/x
3. Step 3: Cross multiply
   4,667.35x = 6,440.36 × 3,158.21
4. Step 4: Simplify right side
   4,667.35x = 20,340,001.15
5. Step 5: Solve for x
   x = 20,340,001.15/4,667.35
6. Step 6: Final answer
   x = 4,357.93