Finding the Fourth Proportional to 8,160.69, 12,242.61 and 3,480.62

Step by Step Solution

1. Step 1: Write the proportion equation
   8,160.69 : 12,242.61 = 3,480.62 : x
2. Step 2: Convert to fraction form
   8,160.69/12,242.61 = 3,480.62/x
3. Step 3: Cross multiply
   8,160.69x = 12,242.61 × 3,480.62
4. Step 4: Simplify right side
   8,160.69x = 42,611,873.22
5. Step 5: Solve for x
   x = 42,611,873.22/8,160.69
6. Step 6: Final answer
   x = 5,221.60