Finding the Fourth Proportional to 3,906.32, 5,390.59 and 2,137.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.32 : 5,390.59 = 2,137.94 : x
2. Step 2: Convert to fraction form
   3,906.32/5,390.59 = 2,137.94/x
3. Step 3: Cross multiply
   3,906.32x = 5,390.59 × 2,137.94
4. Step 4: Simplify right side
   3,906.32x = 11,524,757.98
5. Step 5: Solve for x
   x = 11,524,757.98/3,906.32
6. Step 6: Final answer
   x = 2,950.29