Finding the Fourth Proportional to 13,321.83, 19,986.72 and 3,962.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,321.83 : 19,986.72 = 3,962.16 : x
2. Step 2: Convert to fraction form
   13,321.83/19,986.72 = 3,962.16/x
3. Step 3: Cross multiply
   13,321.83x = 19,986.72 × 3,962.16
4. Step 4: Simplify right side
   13,321.83x = 79,190,582.52
5. Step 5: Solve for x
   x = 79,190,582.52/13,321.83
6. Step 6: Final answer
   x = 5,944.42