Finding the Fourth Proportional to 13,089.82, 18,063.43 and 7,121.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,089.82 : 18,063.43 = 7,121.52 : x
2. Step 2: Convert to fraction form
   13,089.82/18,063.43 = 7,121.52/x
3. Step 3: Cross multiply
   13,089.82x = 18,063.43 × 7,121.52
4. Step 4: Simplify right side
   13,089.82x = 128,639,005.82
5. Step 5: Solve for x
   x = 128,639,005.82/13,089.82
6. Step 6: Final answer
   x = 9,827.41