Finding the Fourth Proportional to 12,448.17, 17,179.49 and 7,144.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,448.17 : 17,179.49 = 7,144.70 : x
2. Step 2: Convert to fraction form
   12,448.17/17,179.49 = 7,144.70/x
3. Step 3: Cross multiply
   12,448.17x = 17,179.49 × 7,144.70
4. Step 4: Simplify right side
   12,448.17x = 122,742,234.17
5. Step 5: Solve for x
   x = 122,742,234.17/12,448.17
6. Step 6: Final answer
   x = 9,860.26