Finding the Fourth Proportional to 3,923.48, 5,415.34 and 2,245.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,923.48 : 5,415.34 = 2,245.86 : x
2. Step 2: Convert to fraction form
   3,923.48/5,415.34 = 2,245.86/x
3. Step 3: Cross multiply
   3,923.48x = 5,415.34 × 2,245.86
4. Step 4: Simplify right side
   3,923.48x = 12,162,076.34
5. Step 5: Solve for x
   x = 12,162,076.34/3,923.48
6. Step 6: Final answer
   x = 3,099.82