Finding the Fourth Proportional to 22,402.18, 30,915.30 and 12,968.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,402.18 : 30,915.30 = 12,968.92 : x
2. Step 2: Convert to fraction form
   22,402.18/30,915.30 = 12,968.92/x
3. Step 3: Cross multiply
   22,402.18x = 30,915.30 × 12,968.92
4. Step 4: Simplify right side
   22,402.18x = 400,938,052.48
5. Step 5: Solve for x
   x = 400,938,052.48/22,402.18
6. Step 6: Final answer
   x = 17,897.28