Finding the Fourth Proportional to 13,443.69, 18,549.59 and 7,853.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,443.69 : 18,549.59 = 7,853.61 : x
2. Step 2: Convert to fraction form
   13,443.69/18,549.59 = 7,853.61/x
3. Step 3: Cross multiply
   13,443.69x = 18,549.59 × 7,853.61
4. Step 4: Simplify right side
   13,443.69x = 145,681,206.25
5. Step 5: Solve for x
   x = 145,681,206.25/13,443.69
6. Step 6: Final answer
   x = 10,836.40