Finding the Fourth Proportional to 21,938, 30,275.16 and 12,002

Step by Step Solution

1. Step 1: Write the proportion equation
   21,938 : 30,275.16 = 12,002 : x
2. Step 2: Convert to fraction form
   21,938/30,275.16 = 12,002/x
3. Step 3: Cross multiply
   21,938x = 30,275.16 × 12,002
4. Step 4: Simplify right side
   21,938x = 363,362,470.32
5. Step 5: Solve for x
   x = 363,362,470.32/21,938
6. Step 6: Final answer
   x = 16,563.15