Finding the Fourth Proportional to 12,839.97, 19,231.89 and 7,894.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,839.97 : 19,231.89 = 7,894.62 : x
2. Step 2: Convert to fraction form
   12,839.97/19,231.89 = 7,894.62/x
3. Step 3: Cross multiply
   12,839.97x = 19,231.89 × 7,894.62
4. Step 4: Simplify right side
   12,839.97x = 151,828,463.43
5. Step 5: Solve for x
   x = 151,828,463.43/12,839.97
6. Step 6: Final answer
   x = 11,824.67