Finding the Fourth Proportional to 39,083.39, 58,632.37 and 12,789.57

Step by Step Solution

1. Step 1: Write the proportion equation
   39,083.39 : 58,632.37 = 12,789.57 : x
2. Step 2: Convert to fraction form
   39,083.39/58,632.37 = 12,789.57/x
3. Step 3: Cross multiply
   39,083.39x = 58,632.37 × 12,789.57
4. Step 4: Simplify right side
   39,083.39x = 749,882,768.41
5. Step 5: Solve for x
   x = 749,882,768.41/39,083.39
6. Step 6: Final answer
   x = 19,186.74