Finding the Fourth Proportional to 3,923.31, 5,415.10 and 2,245.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,923.31 : 5,415.10 = 2,245.69 : x
2. Step 2: Convert to fraction form
   3,923.31/5,415.10 = 2,245.69/x
3. Step 3: Cross multiply
   3,923.31x = 5,415.10 × 2,245.69
4. Step 4: Simplify right side
   3,923.31x = 12,160,626.86
5. Step 5: Solve for x
   x = 12,160,626.86/3,923.31
6. Step 6: Final answer
   x = 3,099.58