Finding the Fourth Proportional to 2,308.55, 3,478.41 and 1,906.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.55 : 3,478.41 = 1,906.69 : x
2. Step 2: Convert to fraction form
   2,308.55/3,478.41 = 1,906.69/x
3. Step 3: Cross multiply
   2,308.55x = 3,478.41 × 1,906.69
4. Step 4: Simplify right side
   2,308.55x = 6,632,257.49
5. Step 5: Solve for x
   x = 6,632,257.49/2,308.55
6. Step 6: Final answer
   x = 2,872.91