Finding the Fourth Proportional to 21,849.24, 30,152.04 and 12,420.84

Step by Step Solution

1. Step 1: Write the proportion equation
   21,849.24 : 30,152.04 = 12,420.84 : x
2. Step 2: Convert to fraction form
   21,849.24/30,152.04 = 12,420.84/x
3. Step 3: Cross multiply
   21,849.24x = 30,152.04 × 12,420.84
4. Step 4: Simplify right side
   21,849.24x = 374,513,664.51
5. Step 5: Solve for x
   x = 374,513,664.51/21,849.24
6. Step 6: Final answer
   x = 17,140.81