Finding the Fourth Proportional to 2,108.38, 3,155.67 and 1,906.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.38 : 3,155.67 = 1,906.30 : x
2. Step 2: Convert to fraction form
   2,108.38/3,155.67 = 1,906.30/x
3. Step 3: Cross multiply
   2,108.38x = 3,155.67 × 1,906.30
4. Step 4: Simplify right side
   2,108.38x = 6,015,653.72
5. Step 5: Solve for x
   x = 6,015,653.72/2,108.38
6. Step 6: Final answer
   x = 2,853.21