Finding the Fourth Proportional to 5,978.89, 8,249.56 and 3,621.61

Step by Step Solution

1. Step 1: Write the proportion equation
   5,978.89 : 8,249.56 = 3,621.61 : x
2. Step 2: Convert to fraction form
   5,978.89/8,249.56 = 3,621.61/x
3. Step 3: Cross multiply
   5,978.89x = 8,249.56 × 3,621.61
4. Step 4: Simplify right side
   5,978.89x = 29,876,688.99
5. Step 5: Solve for x
   x = 29,876,688.99/5,978.89
6. Step 6: Final answer
   x = 4,997.03