Finding the Fourth Proportional to 20,638.26, 30,938.22 and 10,784.34

Step by Step Solution

1. Step 1: Write the proportion equation
   20,638.26 : 30,938.22 = 10,784.34 : x
2. Step 2: Convert to fraction form
   20,638.26/30,938.22 = 10,784.34/x
3. Step 3: Cross multiply
   20,638.26x = 30,938.22 × 10,784.34
4. Step 4: Simplify right side
   20,638.26x = 333,648,283.47
5. Step 5: Solve for x
   x = 333,648,283.47/20,638.26
6. Step 6: Final answer
   x = 16,166.49