Finding the Fourth Proportional to 12,443.48, 17,171.44 and 7,137.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.48 : 17,171.44 = 7,137.96 : x
2. Step 2: Convert to fraction form
   12,443.48/17,171.44 = 7,137.96/x
3. Step 3: Cross multiply
   12,443.48x = 17,171.44 × 7,137.96
4. Step 4: Simplify right side
   12,443.48x = 122,569,051.86
5. Step 5: Solve for x
   x = 122,569,051.86/12,443.48
6. Step 6: Final answer
   x = 9,850.06