Finding the Fourth Proportional to 12,449.46, 17,181.81 and 7,142.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,449.46 : 17,181.81 = 7,142.34 : x
2. Step 2: Convert to fraction form
   12,449.46/17,181.81 = 7,142.34/x
3. Step 3: Cross multiply
   12,449.46x = 17,181.81 × 7,142.34
4. Step 4: Simplify right side
   12,449.46x = 122,718,328.84
5. Step 5: Solve for x
   x = 122,718,328.84/12,449.46
6. Step 6: Final answer
   x = 9,857.32