Finding the Fourth Proportional to 9,107.33, 12,568.82 and 5,128.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,107.33 : 12,568.82 = 5,128.80 : x
2. Step 2: Convert to fraction form
   9,107.33/12,568.82 = 5,128.80/x
3. Step 3: Cross multiply
   9,107.33x = 12,568.82 × 5,128.80
4. Step 4: Simplify right side
   9,107.33x = 64,462,938.37
5. Step 5: Solve for x
   x = 64,462,938.37/9,107.33
6. Step 6: Final answer
   x = 7,078.14