Finding the Fourth Proportional to 21,997.16, 30,348.94 and 12,436.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,997.16 : 30,348.94 = 12,436.12 : x
2. Step 2: Convert to fraction form
   21,997.16/30,348.94 = 12,436.12/x
3. Step 3: Cross multiply
   21,997.16x = 30,348.94 × 12,436.12
4. Step 4: Simplify right side
   21,997.16x = 377,423,059.71
5. Step 5: Solve for x
   x = 377,423,059.71/21,997.16
6. Step 6: Final answer
   x = 17,157.81