Finding the Fourth Proportional to 3,456.38, 4,770.12 and 2,111.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,456.38 : 4,770.12 = 2,111.90 : x
2. Step 2: Convert to fraction form
   3,456.38/4,770.12 = 2,111.90/x
3. Step 3: Cross multiply
   3,456.38x = 4,770.12 × 2,111.90
4. Step 4: Simplify right side
   3,456.38x = 10,074,016.43
5. Step 5: Solve for x
   x = 10,074,016.43/3,456.38
6. Step 6: Final answer
   x = 2,914.61