Finding the Fourth Proportional to 4,109.78, 5,674.23 and 2,431.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,109.78 : 5,674.23 = 2,431.72 : x
2. Step 2: Convert to fraction form
   4,109.78/5,674.23 = 2,431.72/x
3. Step 3: Cross multiply
   4,109.78x = 5,674.23 × 2,431.72
4. Step 4: Simplify right side
   4,109.78x = 13,798,145.67
5. Step 5: Solve for x
   x = 13,798,145.67/4,109.78
6. Step 6: Final answer
   x = 3,357.40