Finding the Fourth Proportional to 13,305.98, 19,961.90 and 3,946.73

Step by Step Solution

1. Step 1: Write the proportion equation
   13,305.98 : 19,961.90 = 3,946.73 : x
2. Step 2: Convert to fraction form
   13,305.98/19,961.90 = 3,946.73/x
3. Step 3: Cross multiply
   13,305.98x = 19,961.90 × 3,946.73
4. Step 4: Simplify right side
   13,305.98x = 78,784,229.59
5. Step 5: Solve for x
   x = 78,784,229.59/13,305.98
6. Step 6: Final answer
   x = 5,920.96