Finding the Fourth Proportional to 12,839.47, 17,717.91 and 8,061.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,839.47 : 17,717.91 = 8,061.89 : x
2. Step 2: Convert to fraction form
   12,839.47/17,717.91 = 8,061.89/x
3. Step 3: Cross multiply
   12,839.47x = 17,717.91 × 8,061.89
4. Step 4: Simplify right side
   12,839.47x = 142,839,841.45
5. Step 5: Solve for x
   x = 142,839,841.45/12,839.47
6. Step 6: Final answer
   x = 11,125.06