Finding the Fourth Proportional to 20,187.63, 30,287.61 and 10,333.89

Step by Step Solution

1. Step 1: Write the proportion equation
   20,187.63 : 30,287.61 = 10,333.89 : x
2. Step 2: Convert to fraction form
   20,187.63/30,287.61 = 10,333.89/x
3. Step 3: Cross multiply
   20,187.63x = 30,287.61 × 10,333.89
4. Step 4: Simplify right side
   20,187.63x = 312,988,830.10
5. Step 5: Solve for x
   x = 312,988,830.10/20,187.63
6. Step 6: Final answer
   x = 15,503.99