Finding the Fourth Proportional to 21,601.46, 29,810.06 and 12,647.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,601.46 : 29,810.06 = 12,647.18 : x
2. Step 2: Convert to fraction form
   21,601.46/29,810.06 = 12,647.18/x
3. Step 3: Cross multiply
   21,601.46x = 29,810.06 × 12,647.18
4. Step 4: Simplify right side
   21,601.46x = 377,013,253.35
5. Step 5: Solve for x
   x = 377,013,253.35/21,601.46
6. Step 6: Final answer
   x = 17,453.14