Finding the Fourth Proportional to 12,449.95, 17,181.01 and 7,144.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,449.95 : 17,181.01 = 7,144.81 : x
2. Step 2: Convert to fraction form
   12,449.95/17,181.01 = 7,144.81/x
3. Step 3: Cross multiply
   12,449.95x = 17,181.01 × 7,144.81
4. Step 4: Simplify right side
   12,449.95x = 122,755,018.04
5. Step 5: Solve for x
   x = 122,755,018.04/12,449.95
6. Step 6: Final answer
   x = 9,859.88