Finding the Fourth Proportional to 2,575.50, 3,858.67 and 931.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,575.50 : 3,858.67 = 931.02 : x
2. Step 2: Convert to fraction form
   2,575.50/3,858.67 = 931.02/x
3. Step 3: Cross multiply
   2,575.50x = 3,858.67 × 931.02
4. Step 4: Simplify right side
   2,575.50x = 3,592,498.94
5. Step 5: Solve for x
   x = 3,592,498.94/2,575.50
6. Step 6: Final answer
   x = 1,394.87