Finding the Fourth Proportional to 28,446.51, 42,674.72 and 9,728.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,446.51 : 42,674.72 = 9,728.42 : x
2. Step 2: Convert to fraction form
   28,446.51/42,674.72 = 9,728.42/x
3. Step 3: Cross multiply
   28,446.51x = 42,674.72 × 9,728.42
4. Step 4: Simplify right side
   28,446.51x = 415,157,599.54
5. Step 5: Solve for x
   x = 415,157,599.54/28,446.51
6. Step 6: Final answer
   x = 14,594.32