Finding the Fourth Proportional to 21,626.57, 29,844.69 and 12,672.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,626.57 : 29,844.69 = 12,672.29 : x
2. Step 2: Convert to fraction form
   21,626.57/29,844.69 = 12,672.29/x
3. Step 3: Cross multiply
   21,626.57x = 29,844.69 × 12,672.29
4. Step 4: Simplify right side
   21,626.57x = 378,200,566.64
5. Step 5: Solve for x
   x = 378,200,566.64/21,626.57
6. Step 6: Final answer
   x = 17,487.77