Finding the Fourth Proportional to 5,480.06, 8,216.24 and 3,720.74

Step by Step Solution

1. Step 1: Write the proportion equation
   5,480.06 : 8,216.24 = 3,720.74 : x
2. Step 2: Convert to fraction form
   5,480.06/8,216.24 = 3,720.74/x
3. Step 3: Cross multiply
   5,480.06x = 8,216.24 × 3,720.74
4. Step 4: Simplify right side
   5,480.06x = 30,570,433.13
5. Step 5: Solve for x
   x = 30,570,433.13/5,480.06
6. Step 6: Final answer
   x = 5,578.49