Finding the Fourth Proportional to 13,308.96, 19,965.23 and 3,949.11

Step by Step Solution

1. Step 1: Write the proportion equation
   13,308.96 : 19,965.23 = 3,949.11 : x
2. Step 2: Convert to fraction form
   13,308.96/19,965.23 = 3,949.11/x
3. Step 3: Cross multiply
   13,308.96x = 19,965.23 × 3,949.11
4. Step 4: Simplify right side
   13,308.96x = 78,844,889.45
5. Step 5: Solve for x
   x = 78,844,889.45/13,308.96
6. Step 6: Final answer
   x = 5,924.20