Finding the Fourth Proportional to 72,738.39, 108,904.42 and 39,338.79

Step by Step Solution

1. Step 1: Write the proportion equation
   72,738.39 : 108,904.42 = 39,338.79 : x
2. Step 2: Convert to fraction form
   72,738.39/108,904.42 = 39,338.79/x
3. Step 3: Cross multiply
   72,738.39x = 108,904.42 × 39,338.79
4. Step 4: Simplify right side
   72,738.39x = 4,284,167,465.58
5. Step 5: Solve for x
   x = 4,284,167,465.58/72,738.39
6. Step 6: Final answer
   x = 58,898.30