Finding the Fourth Proportional to 30,718.69, 42,395.00 and 18,789.98

Step by Step Solution

1. Step 1: Write the proportion equation
   30,718.69 : 42,395.00 = 18,789.98 : x
2. Step 2: Convert to fraction form
   30,718.69/42,395.00 = 18,789.98/x
3. Step 3: Cross multiply
   30,718.69x = 42,395.00 × 18,789.98
4. Step 4: Simplify right side
   30,718.69x = 796,600,896.18
5. Step 5: Solve for x
   x = 796,600,896.18/30,718.69
6. Step 6: Final answer
   x = 25,932.12