Finding the Fourth Proportional to 30,009.97, 45,012.79 and 13,144.69

Step by Step Solution

1. Step 1: Write the proportion equation
   30,009.97 : 45,012.79 = 13,144.69 : x
2. Step 2: Convert to fraction form
   30,009.97/45,012.79 = 13,144.69/x
3. Step 3: Cross multiply
   30,009.97x = 45,012.79 × 13,144.69
4. Step 4: Simplify right side
   30,009.97x = 591,679,170.59
5. Step 5: Solve for x
   x = 591,679,170.59/30,009.97
6. Step 6: Final answer
   x = 19,716.09