Finding the Fourth Proportional to 30,728.52, 42,405.93 and 18,153.27

Step by Step Solution

1. Step 1: Write the proportion equation
   30,728.52 : 42,405.93 = 18,153.27 : x
2. Step 2: Convert to fraction form
   30,728.52/42,405.93 = 18,153.27/x
3. Step 3: Cross multiply
   30,728.52x = 42,405.93 × 18,153.27
4. Step 4: Simplify right side
   30,728.52x = 769,806,296.89
5. Step 5: Solve for x
   x = 769,806,296.89/30,728.52
6. Step 6: Final answer
   x = 25,051.85