Finding the Fourth Proportional to 13,841.94, 19,109.77 and 9,139.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,841.94 : 19,109.77 = 9,139.89 : x
2. Step 2: Convert to fraction form
   13,841.94/19,109.77 = 9,139.89/x
3. Step 3: Cross multiply
   13,841.94x = 19,109.77 × 9,139.89
4. Step 4: Simplify right side
   13,841.94x = 174,661,188.46
5. Step 5: Solve for x
   x = 174,661,188.46/13,841.94
6. Step 6: Final answer
   x = 12,618.26