Finding the Fourth Proportional to 13,321.48, 19,986.22 and 3,961.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,321.48 : 19,986.22 = 3,961.83 : x
2. Step 2: Convert to fraction form
   13,321.48/19,986.22 = 3,961.83/x
3. Step 3: Cross multiply
   13,321.48x = 19,986.22 × 3,961.83
4. Step 4: Simplify right side
   13,321.48x = 79,182,005.98
5. Step 5: Solve for x
   x = 79,182,005.98/13,321.48
6. Step 6: Final answer
   x = 5,943.93