Finding the Fourth Proportional to 21,875.98, 30,203.38 and 16,831.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,875.98 : 30,203.38 = 16,831.30 : x
2. Step 2: Convert to fraction form
   21,875.98/30,203.38 = 16,831.30/x
3. Step 3: Cross multiply
   21,875.98x = 30,203.38 × 16,831.30
4. Step 4: Simplify right side
   21,875.98x = 508,362,149.79
5. Step 5: Solve for x
   x = 508,362,149.79/21,875.98
6. Step 6: Final answer
   x = 23,238.37