Finding the Fourth Proportional to 72,315.92, 108,315.95 and 30,067.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72,315.92 : 108,315.95 = 30,067.89 : x
2. Step 2: Convert to fraction form
   72,315.92/108,315.95 = 30,067.89/x
3. Step 3: Cross multiply
   72,315.92x = 108,315.95 × 30,067.89
4. Step 4: Simplify right side
   72,315.92x = 3,256,831,919.51
5. Step 5: Solve for x
   x = 3,256,831,919.51/72,315.92
6. Step 6: Final answer
   x = 45,036.17