Finding the Fourth Proportional to 20,729.49, 31,112.27 and 10,875.71

Step by Step Solution

1. Step 1: Write the proportion equation
   20,729.49 : 31,112.27 = 10,875.71 : x
2. Step 2: Convert to fraction form
   20,729.49/31,112.27 = 10,875.71/x
3. Step 3: Cross multiply
   20,729.49x = 31,112.27 × 10,875.71
4. Step 4: Simplify right side
   20,729.49x = 338,367,816.02
5. Step 5: Solve for x
   x = 338,367,816.02/20,729.49
6. Step 6: Final answer
   x = 16,323.02