Finding the Fourth Proportional to 2,540.12, 3,811.32 and 897.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.12 : 3,811.32 = 897.86 : x
2. Step 2: Convert to fraction form
   2,540.12/3,811.32 = 897.86/x
3. Step 3: Cross multiply
   2,540.12x = 3,811.32 × 897.86
4. Step 4: Simplify right side
   2,540.12x = 3,422,031.78
5. Step 5: Solve for x
   x = 3,422,031.78/2,540.12
6. Step 6: Final answer
   x = 1,347.19