Finding the Fourth Proportional to 2,554.42, 3,805.95 and 2,386.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,554.42 : 3,805.95 = 2,386.78 : x
2. Step 2: Convert to fraction form
   2,554.42/3,805.95 = 2,386.78/x
3. Step 3: Cross multiply
   2,554.42x = 3,805.95 × 2,386.78
4. Step 4: Simplify right side
   2,554.42x = 9,083,965.34
5. Step 5: Solve for x
   x = 9,083,965.34/2,554.42
6. Step 6: Final answer
   x = 3,556.18