Finding the Fourth Proportional to 12,322.28, 17,002.78 and 7,017.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,322.28 : 17,002.78 = 7,017.20 : x
2. Step 2: Convert to fraction form
   12,322.28/17,002.78 = 7,017.20/x
3. Step 3: Cross multiply
   12,322.28x = 17,002.78 × 7,017.20
4. Step 4: Simplify right side
   12,322.28x = 119,311,907.82
5. Step 5: Solve for x
   x = 119,311,907.82/12,322.28
6. Step 6: Final answer
   x = 9,682.62