Finding the Fourth Proportional to 22,397.34, 30,912.12 and 12,971.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,397.34 : 30,912.12 = 12,971.64 : x
2. Step 2: Convert to fraction form
   22,397.34/30,912.12 = 12,971.64/x
3. Step 3: Cross multiply
   22,397.34x = 30,912.12 × 12,971.64
4. Step 4: Simplify right side
   22,397.34x = 400,980,892.28
5. Step 5: Solve for x
   x = 400,980,892.28/22,397.34
6. Step 6: Final answer
   x = 17,903.06