Finding the Fourth Proportional to 12,467.20, 17,198.94 and 7,428.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,467.20 : 17,198.94 = 7,428.59 : x
2. Step 2: Convert to fraction form
   12,467.20/17,198.94 = 7,428.59/x
3. Step 3: Cross multiply
   12,467.20x = 17,198.94 × 7,428.59
4. Step 4: Simplify right side
   12,467.20x = 127,763,836.55
5. Step 5: Solve for x
   x = 127,763,836.55/12,467.20
6. Step 6: Final answer
   x = 10,248.00