Finding the Fourth Proportional to 13,507.97, 18,618.69 and 9,030.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,507.97 : 18,618.69 = 9,030.09 : x
2. Step 2: Convert to fraction form
   13,507.97/18,618.69 = 9,030.09/x
3. Step 3: Cross multiply
   13,507.97x = 18,618.69 × 9,030.09
4. Step 4: Simplify right side
   13,507.97x = 168,128,401.23
5. Step 5: Solve for x
   x = 168,128,401.23/13,507.97
6. Step 6: Final answer
   x = 12,446.61