Finding the Fourth Proportional to 2,540.22, 3,810.78 and 897.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.22 : 3,810.78 = 897.72 : x
2. Step 2: Convert to fraction form
   2,540.22/3,810.78 = 897.72/x
3. Step 3: Cross multiply
   2,540.22x = 3,810.78 × 897.72
4. Step 4: Simplify right side
   2,540.22x = 3,421,013.42
5. Step 5: Solve for x
   x = 3,421,013.42/2,540.22
6. Step 6: Final answer
   x = 1,346.74