Finding the Fourth Proportional to 13,307.83, 19,965.95 and 3,947.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,307.83 : 19,965.95 = 3,947.88 : x
2. Step 2: Convert to fraction form
   13,307.83/19,965.95 = 3,947.88/x
3. Step 3: Cross multiply
   13,307.83x = 19,965.95 × 3,947.88
4. Step 4: Simplify right side
   13,307.83x = 78,823,174.69
5. Step 5: Solve for x
   x = 78,823,174.69/13,307.83
6. Step 6: Final answer
   x = 5,923.07