Finding the Fourth Proportional to 9,028.80, 12,424.32 and 7,983.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,028.80 : 12,424.32 = 7,983.36 : x
2. Step 2: Convert to fraction form
   9,028.80/12,424.32 = 7,983.36/x
3. Step 3: Cross multiply
   9,028.80x = 12,424.32 × 7,983.36
4. Step 4: Simplify right side
   9,028.80x = 99,187,819.32
5. Step 5: Solve for x
   x = 99,187,819.32/9,028.80
6. Step 6: Final answer
   x = 10,985.71