Finding the Fourth Proportional to 2,575.81, 3,554.63 and 1,396.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,575.81 : 3,554.63 = 1,396.89 : x
2. Step 2: Convert to fraction form
   2,575.81/3,554.63 = 1,396.89/x
3. Step 3: Cross multiply
   2,575.81x = 3,554.63 × 1,396.89
4. Step 4: Simplify right side
   2,575.81x = 4,965,427.10
5. Step 5: Solve for x
   x = 4,965,427.10/2,575.81
6. Step 6: Final answer
   x = 1,927.71