Finding the Fourth Proportional to 39,111.46, 58,661.25 and 12,815.62

Step by Step Solution

1. Step 1: Write the proportion equation
   39,111.46 : 58,661.25 = 12,815.62 : x
2. Step 2: Convert to fraction form
   39,111.46/58,661.25 = 12,815.62/x
3. Step 3: Cross multiply
   39,111.46x = 58,661.25 × 12,815.62
4. Step 4: Simplify right side
   39,111.46x = 751,780,288.73
5. Step 5: Solve for x
   x = 751,780,288.73/39,111.46
6. Step 6: Final answer
   x = 19,221.48