Finding the Fourth Proportional to 9,075.72, 12,513.78 and 7,745.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,075.72 : 12,513.78 = 7,745.16 : x
2. Step 2: Convert to fraction form
   9,075.72/12,513.78 = 7,745.16/x
3. Step 3: Cross multiply
   9,075.72x = 12,513.78 × 7,745.16
4. Step 4: Simplify right side
   9,075.72x = 96,921,228.30
5. Step 5: Solve for x
   x = 96,921,228.30/9,075.72
6. Step 6: Final answer
   x = 10,679.18