Finding the Fourth Proportional to 12,018.53, 18,003.31 and 9,805.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,018.53 : 18,003.31 = 9,805.25 : x
2. Step 2: Convert to fraction form
   12,018.53/18,003.31 = 9,805.25/x
3. Step 3: Cross multiply
   12,018.53x = 18,003.31 × 9,805.25
4. Step 4: Simplify right side
   12,018.53x = 176,526,955.38
5. Step 5: Solve for x
   x = 176,526,955.38/12,018.53
6. Step 6: Final answer
   x = 14,687.90