Finding the Fourth Proportional to 8,173.89, 12,258.66 and 3,491.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,173.89 : 12,258.66 = 3,491.60 : x
2. Step 2: Convert to fraction form
   8,173.89/12,258.66 = 3,491.60/x
3. Step 3: Cross multiply
   8,173.89x = 12,258.66 × 3,491.60
4. Step 4: Simplify right side
   8,173.89x = 42,802,275.96
5. Step 5: Solve for x
   x = 42,802,275.96/8,173.89
6. Step 6: Final answer
   x = 5,236.46