Finding the Fourth Proportional to 28,662.35, 42,969.83 and 10,889.33

Step by Step Solution

1. Step 1: Write the proportion equation
   28,662.35 : 42,969.83 = 10,889.33 : x
2. Step 2: Convert to fraction form
   28,662.35/42,969.83 = 10,889.33/x
3. Step 3: Cross multiply
   28,662.35x = 42,969.83 × 10,889.33
4. Step 4: Simplify right side
   28,662.35x = 467,912,389.62
5. Step 5: Solve for x
   x = 467,912,389.62/28,662.35
6. Step 6: Final answer
   x = 16,324.99