Finding the Fourth Proportional to 13,320.42, 19,983.33 and 3,960.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,320.42 : 19,983.33 = 3,960.60 : x
2. Step 2: Convert to fraction form
   13,320.42/19,983.33 = 3,960.60/x
3. Step 3: Cross multiply
   13,320.42x = 19,983.33 × 3,960.60
4. Step 4: Simplify right side
   13,320.42x = 79,145,976.80
5. Step 5: Solve for x
   x = 79,145,976.80/13,320.42
6. Step 6: Final answer
   x = 5,941.70