Finding the Fourth Proportional to 13,058.05, 18,020.12 and 7,089.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,058.05 : 18,020.12 = 7,089.72 : x
2. Step 2: Convert to fraction form
   13,058.05/18,020.12 = 7,089.72/x
3. Step 3: Cross multiply
   13,058.05x = 18,020.12 × 7,089.72
4. Step 4: Simplify right side
   13,058.05x = 127,757,605.17
5. Step 5: Solve for x
   x = 127,757,605.17/13,058.05
6. Step 6: Final answer
   x = 9,783.82