Finding the Fourth Proportional to 12,664.32, 17,475.20 and 7,075.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,664.32 : 17,475.20 = 7,075.20 : x
2. Step 2: Convert to fraction form
   12,664.32/17,475.20 = 7,075.20/x
3. Step 3: Cross multiply
   12,664.32x = 17,475.20 × 7,075.20
4. Step 4: Simplify right side
   12,664.32x = 123,640,535.04
5. Step 5: Solve for x
   x = 123,640,535.04/12,664.32
6. Step 6: Final answer
   x = 9,762.90