Finding the Fourth Proportional to 9,383.78, 12,949.09 and 5,133.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,383.78 : 12,949.09 = 5,133.99 : x
2. Step 2: Convert to fraction form
   9,383.78/12,949.09 = 5,133.99/x
3. Step 3: Cross multiply
   9,383.78x = 12,949.09 × 5,133.99
4. Step 4: Simplify right side
   9,383.78x = 66,480,498.57
5. Step 5: Solve for x
   x = 66,480,498.57/9,383.78
6. Step 6: Final answer
   x = 7,084.62