Finding the Fourth Proportional to 21,443.98, 29,592.67 and 12,012.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,443.98 : 29,592.67 = 12,012.55 : x
2. Step 2: Convert to fraction form
   21,443.98/29,592.67 = 12,012.55/x
3. Step 3: Cross multiply
   21,443.98x = 29,592.67 × 12,012.55
4. Step 4: Simplify right side
   21,443.98x = 355,483,428.01
5. Step 5: Solve for x
   x = 355,483,428.01/21,443.98
6. Step 6: Final answer
   x = 16,577.31