Finding the Fourth Proportional to 20,128.34, 30,196.31 and 9,034.76

Step by Step Solution

1. Step 1: Write the proportion equation
   20,128.34 : 30,196.31 = 9,034.76 : x
2. Step 2: Convert to fraction form
   20,128.34/30,196.31 = 9,034.76/x
3. Step 3: Cross multiply
   20,128.34x = 30,196.31 × 9,034.76
4. Step 4: Simplify right side
   20,128.34x = 272,816,217.58
5. Step 5: Solve for x
   x = 272,816,217.58/20,128.34
6. Step 6: Final answer
   x = 13,553.84