Finding the Fourth Proportional to 10,921.12, 15,075.84 and 7,575.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921.12 : 15,075.84 = 7,575.04 : x
2. Step 2: Convert to fraction form
   10,921.12/15,075.84 = 7,575.04/x
3. Step 3: Cross multiply
   10,921.12x = 15,075.84 × 7,575.04
4. Step 4: Simplify right side
   10,921.12x = 114,200,091.03
5. Step 5: Solve for x
   x = 114,200,091.03/10,921.12
6. Step 6: Final answer
   x = 10,456.81