Finding the Fourth Proportional to 21,476.72, 29,637.93 and 12,522.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,476.72 : 29,637.93 = 12,522.55 : x
2. Step 2: Convert to fraction form
   21,476.72/29,637.93 = 12,522.55/x
3. Step 3: Cross multiply
   21,476.72x = 29,637.93 × 12,522.55
4. Step 4: Simplify right side
   21,476.72x = 371,142,383.10
5. Step 5: Solve for x
   x = 371,142,383.10/21,476.72
6. Step 6: Final answer
   x = 17,281.15