Finding the Fourth Proportional to 12,664.20, 17,476.58 and 7,075.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,664.20 : 17,476.58 = 7,075.20 : x
2. Step 2: Convert to fraction form
   12,664.20/17,476.58 = 7,075.20/x
3. Step 3: Cross multiply
   12,664.20x = 17,476.58 × 7,075.20
4. Step 4: Simplify right side
   12,664.20x = 123,650,298.82
5. Step 5: Solve for x
   x = 123,650,298.82/12,664.20
6. Step 6: Final answer
   x = 9,763.77