Finding the Fourth Proportional to 2,575.41, 3,862.20 and 931.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,575.41 : 3,862.20 = 931.53 : x
2. Step 2: Convert to fraction form
   2,575.41/3,862.20 = 931.53/x
3. Step 3: Cross multiply
   2,575.41x = 3,862.20 × 931.53
4. Step 4: Simplify right side
   2,575.41x = 3,597,755.17
5. Step 5: Solve for x
   x = 3,597,755.17/2,575.41
6. Step 6: Final answer
   x = 1,396.96