Finding the Fourth Proportional to 22,854.69, 31,539.54 and 12,783.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,854.69 : 31,539.54 = 12,783.30 : x
2. Step 2: Convert to fraction form
   22,854.69/31,539.54 = 12,783.30/x
3. Step 3: Cross multiply
   22,854.69x = 31,539.54 × 12,783.30
4. Step 4: Simplify right side
   22,854.69x = 403,179,401.68
5. Step 5: Solve for x
   x = 403,179,401.68/22,854.69
6. Step 6: Final answer
   x = 17,640.99