Finding the Fourth Proportional to 3,938.54, 5,435.33 and 2,170.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938.54 : 5,435.33 = 2,170.10 : x
2. Step 2: Convert to fraction form
   3,938.54/5,435.33 = 2,170.10/x
3. Step 3: Cross multiply
   3,938.54x = 5,435.33 × 2,170.10
4. Step 4: Simplify right side
   3,938.54x = 11,795,212.37
5. Step 5: Solve for x
   x = 11,795,212.37/3,938.54
6. Step 6: Final answer
   x = 2,994.82