Finding the Fourth Proportional to 20,315.78, 30,448.29 and 9,783.83

Step by Step Solution

1. Step 1: Write the proportion equation
   20,315.78 : 30,448.29 = 9,783.83 : x
2. Step 2: Convert to fraction form
   20,315.78/30,448.29 = 9,783.83/x
3. Step 3: Cross multiply
   20,315.78x = 30,448.29 × 9,783.83
4. Step 4: Simplify right side
   20,315.78x = 297,900,969.27
5. Step 5: Solve for x
   x = 297,900,969.27/20,315.78
6. Step 6: Final answer
   x = 14,663.53