Finding the Fourth Proportional to 21,601.39, 29,810.55 and 12,648.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,601.39 : 29,810.55 = 12,648.06 : x
2. Step 2: Convert to fraction form
   21,601.39/29,810.55 = 12,648.06/x
3. Step 3: Cross multiply
   21,601.39x = 29,810.55 × 12,648.06
4. Step 4: Simplify right side
   21,601.39x = 377,045,625.03
5. Step 5: Solve for x
   x = 377,045,625.03/21,601.39
6. Step 6: Final answer
   x = 17,454.69