Finding the Fourth Proportional to 11,880.50, 17,817.92 and 3,983.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,880.50 : 17,817.92 = 3,983.30 : x
2. Step 2: Convert to fraction form
   11,880.50/17,817.92 = 3,983.30/x
3. Step 3: Cross multiply
   11,880.50x = 17,817.92 × 3,983.30
4. Step 4: Simplify right side
   11,880.50x = 70,974,011.73
5. Step 5: Solve for x
   x = 70,974,011.73/11,880.50
6. Step 6: Final answer
   x = 5,973.99