Finding the Fourth Proportional to 6,139.73, 8,472.47 and 3,621.94

Step by Step Solution

1. Step 1: Write the proportion equation
   6,139.73 : 8,472.47 = 3,621.94 : x
2. Step 2: Convert to fraction form
   6,139.73/8,472.47 = 3,621.94/x
3. Step 3: Cross multiply
   6,139.73x = 8,472.47 × 3,621.94
4. Step 4: Simplify right side
   6,139.73x = 30,686,738.70
5. Step 5: Solve for x
   x = 30,686,738.70/6,139.73
6. Step 6: Final answer
   x = 4,998.06