Finding the Fourth Proportional to 8,158.74, 12,235.71 and 3,478.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,158.74 : 12,235.71 = 3,478.71 : x
2. Step 2: Convert to fraction form
   8,158.74/12,235.71 = 3,478.71/x
3. Step 3: Cross multiply
   8,158.74x = 12,235.71 × 3,478.71
4. Step 4: Simplify right side
   8,158.74x = 42,564,486.73
5. Step 5: Solve for x
   x = 42,564,486.73/8,158.74
6. Step 6: Final answer
   x = 5,217.04