Finding the Fourth Proportional to 13,309.06, 19,960.52 and 3,946.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,309.06 : 19,960.52 = 3,946.82 : x
2. Step 2: Convert to fraction form
   13,309.06/19,960.52 = 3,946.82/x
3. Step 3: Cross multiply
   13,309.06x = 19,960.52 × 3,946.82
4. Step 4: Simplify right side
   13,309.06x = 78,780,559.81
5. Step 5: Solve for x
   x = 78,780,559.81/13,309.06
6. Step 6: Final answer
   x = 5,919.32