Finding the Fourth Proportional to 21,557.47, 29,749 and 12,126.03

Step by Step Solution

1. Step 1: Write the proportion equation
   21,557.47 : 29,749 = 12,126.03 : x
2. Step 2: Convert to fraction form
   21,557.47/29,749 = 12,126.03/x
3. Step 3: Cross multiply
   21,557.47x = 29,749 × 12,126.03
4. Step 4: Simplify right side
   21,557.47x = 360,737,266.47
5. Step 5: Solve for x
   x = 360,737,266.47/21,557.47
6. Step 6: Final answer
   x = 16,733.75