Finding the Fourth Proportional to 21,785.12, 30,062.56 and 12,353.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,785.12 : 30,062.56 = 12,353.48 : x
2. Step 2: Convert to fraction form
   21,785.12/30,062.56 = 12,353.48/x
3. Step 3: Cross multiply
   21,785.12x = 30,062.56 × 12,353.48
4. Step 4: Simplify right side
   21,785.12x = 371,377,233.71
5. Step 5: Solve for x
   x = 371,377,233.71/21,785.12
6. Step 6: Final answer
   x = 17,047.29