Finding the Fourth Proportional to 2,806.39, 3,872.78 and 1,547.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,806.39 : 3,872.78 = 1,547.42 : x
2. Step 2: Convert to fraction form
   2,806.39/3,872.78 = 1,547.42/x
3. Step 3: Cross multiply
   2,806.39x = 3,872.78 × 1,547.42
4. Step 4: Simplify right side
   2,806.39x = 5,992,801.73
5. Step 5: Solve for x
   x = 5,992,801.73/2,806.39
6. Step 6: Final answer
   x = 2,135.41