Finding the Fourth Proportional to 72,139.63, 108,229.41 and 30,039.51

Step by Step Solution

1. Step 1: Write the proportion equation
   72,139.63 : 108,229.41 = 30,039.51 : x
2. Step 2: Convert to fraction form
   72,139.63/108,229.41 = 30,039.51/x
3. Step 3: Cross multiply
   72,139.63x = 108,229.41 × 30,039.51
4. Step 4: Simplify right side
   72,139.63x = 3,251,158,443.99
5. Step 5: Solve for x
   x = 3,251,158,443.99/72,139.63
6. Step 6: Final answer
   x = 45,067.58