Finding the Fourth Proportional to 2,575.83, 3,863.71 and 931.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,575.83 : 3,863.71 = 931.75 : x
2. Step 2: Convert to fraction form
   2,575.83/3,863.71 = 931.75/x
3. Step 3: Cross multiply
   2,575.83x = 3,863.71 × 931.75
4. Step 4: Simplify right side
   2,575.83x = 3,600,011.79
5. Step 5: Solve for x
   x = 3,600,011.79/2,575.83
6. Step 6: Final answer
   x = 1,397.61