Finding the Fourth Proportional to 21,928.51, 30,259 and 12,366.26

Step by Step Solution

1. Step 1: Write the proportion equation
   21,928.51 : 30,259 = 12,366.26 : x
2. Step 2: Convert to fraction form
   21,928.51/30,259 = 12,366.26/x
3. Step 3: Cross multiply
   21,928.51x = 30,259 × 12,366.26
4. Step 4: Simplify right side
   21,928.51x = 374,190,661.34
5. Step 5: Solve for x
   x = 374,190,661.34/21,928.51
6. Step 6: Final answer
   x = 17,064.12