Finding the Fourth Proportional to 21,768.47, 30,047.33 and 12,343.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,768.47 : 30,047.33 = 12,343.31 : x
2. Step 2: Convert to fraction form
   21,768.47/30,047.33 = 12,343.31/x
3. Step 3: Cross multiply
   21,768.47x = 30,047.33 × 12,343.31
4. Step 4: Simplify right side
   21,768.47x = 370,883,447.15
5. Step 5: Solve for x
   x = 370,883,447.15/21,768.47
6. Step 6: Final answer
   x = 17,037.64