Finding the Fourth Proportional to 8,270.19, 12,405.83 and 3,074.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,270.19 : 12,405.83 = 3,074.31 : x
2. Step 2: Convert to fraction form
   8,270.19/12,405.83 = 3,074.31/x
3. Step 3: Cross multiply
   8,270.19x = 12,405.83 × 3,074.31
4. Step 4: Simplify right side
   8,270.19x = 38,139,351.86
5. Step 5: Solve for x
   x = 38,139,351.86/8,270.19
6. Step 6: Final answer
   x = 4,611.67