Finding the Fourth Proportional to 12,443.08, 17,171.82 and 7,138.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.08 : 17,171.82 = 7,138.84 : x
2. Step 2: Convert to fraction form
   12,443.08/17,171.82 = 7,138.84/x
3. Step 3: Cross multiply
   12,443.08x = 17,171.82 × 7,138.84
4. Step 4: Simplify right side
   12,443.08x = 122,586,875.49
5. Step 5: Solve for x
   x = 122,586,875.49/12,443.08
6. Step 6: Final answer
   x = 9,851.81