Finding the Fourth Proportional to 2,575.71, 3,554.47 and 1,396.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,575.71 : 3,554.47 = 1,396.78 : x
2. Step 2: Convert to fraction form
   2,575.71/3,554.47 = 1,396.78/x
3. Step 3: Cross multiply
   2,575.71x = 3,554.47 × 1,396.78
4. Step 4: Simplify right side
   2,575.71x = 4,964,800.42
5. Step 5: Solve for x
   x = 4,964,800.42/2,575.71
6. Step 6: Final answer
   x = 1,927.55