Finding the Fourth Proportional to 9,300.48, 12,806.58 and 8,039.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,300.48 : 12,806.58 = 8,039.28 : x
2. Step 2: Convert to fraction form
   9,300.48/12,806.58 = 8,039.28/x
3. Step 3: Cross multiply
   9,300.48x = 12,806.58 × 8,039.28
4. Step 4: Simplify right side
   9,300.48x = 102,955,682.46
5. Step 5: Solve for x
   x = 102,955,682.46/9,300.48
6. Step 6: Final answer
   x = 11,069.93