Finding the Fourth Proportional to 2,575.16, 3,553.71 and 1,396.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,575.16 : 3,553.71 = 1,396.20 : x
2. Step 2: Convert to fraction form
   2,575.16/3,553.71 = 1,396.20/x
3. Step 3: Cross multiply
   2,575.16x = 3,553.71 × 1,396.20
4. Step 4: Simplify right side
   2,575.16x = 4,961,689.90
5. Step 5: Solve for x
   x = 4,961,689.90/2,575.16
6. Step 6: Final answer
   x = 1,926.75