Finding the Fourth Proportional to 3,906.17, 5,850.05 and 3,390.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.17 : 5,850.05 = 3,390.38 : x
2. Step 2: Convert to fraction form
   3,906.17/5,850.05 = 3,390.38/x
3. Step 3: Cross multiply
   3,906.17x = 5,850.05 × 3,390.38
4. Step 4: Simplify right side
   3,906.17x = 19,833,846.32
5. Step 5: Solve for x
   x = 19,833,846.32/3,906.17
6. Step 6: Final answer
   x = 5,077.58