Finding the Fourth Proportional to 2,920.05, 4,373.91 and 2,667.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,920.05 : 4,373.91 = 2,667.87 : x
2. Step 2: Convert to fraction form
   2,920.05/4,373.91 = 2,667.87/x
3. Step 3: Cross multiply
   2,920.05x = 4,373.91 × 2,667.87
4. Step 4: Simplify right side
   2,920.05x = 11,669,023.27
5. Step 5: Solve for x
   x = 11,669,023.27/2,920.05
6. Step 6: Final answer
   x = 3,996.17