Finding the Fourth Proportional to 20,141.98, 30,202.59 and 9,039.15

Step by Step Solution

1. Step 1: Write the proportion equation
   20,141.98 : 30,202.59 = 9,039.15 : x
2. Step 2: Convert to fraction form
   20,141.98/30,202.59 = 9,039.15/x
3. Step 3: Cross multiply
   20,141.98x = 30,202.59 × 9,039.15
4. Step 4: Simplify right side
   20,141.98x = 273,005,639.51
5. Step 5: Solve for x
   x = 273,005,639.51/20,141.98
6. Step 6: Final answer
   x = 13,554.06