Finding the Fourth Proportional to 21,466.40, 29,629.82 and 12,967.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,466.40 : 29,629.82 = 12,967.18 : x
2. Step 2: Convert to fraction form
   21,466.40/29,629.82 = 12,967.18/x
3. Step 3: Cross multiply
   21,466.40x = 29,629.82 × 12,967.18
4. Step 4: Simplify right side
   21,466.40x = 384,215,209.31
5. Step 5: Solve for x
   x = 384,215,209.31/21,466.40
6. Step 6: Final answer
   x = 17,898.45