Finding the Fourth Proportional to 21,783.12, 30,061.56 and 12,353.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,783.12 : 30,061.56 = 12,353.52 : x
2. Step 2: Convert to fraction form
   21,783.12/30,061.56 = 12,353.52/x
3. Step 3: Cross multiply
   21,783.12x = 30,061.56 × 12,353.52
4. Step 4: Simplify right side
   21,783.12x = 371,366,082.69
5. Step 5: Solve for x
   x = 371,366,082.69/21,783.12
6. Step 6: Final answer
   x = 17,048.34