Finding the Fourth Proportional to 28,128.78, 42,161.22 and 9,404.46

Step by Step Solution

1. Step 1: Write the proportion equation
   28,128.78 : 42,161.22 = 9,404.46 : x
2. Step 2: Convert to fraction form
   28,128.78/42,161.22 = 9,404.46/x
3. Step 3: Cross multiply
   28,128.78x = 42,161.22 × 9,404.46
4. Step 4: Simplify right side
   28,128.78x = 396,503,507.04
5. Step 5: Solve for x
   x = 396,503,507.04/28,128.78
6. Step 6: Final answer
   x = 14,096.01