Finding the Fourth Proportional to 12,354.50, 18,485.27 and 8,663.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,354.50 : 18,485.27 = 8,663.94 : x
2. Step 2: Convert to fraction form
   12,354.50/18,485.27 = 8,663.94/x
3. Step 3: Cross multiply
   12,354.50x = 18,485.27 × 8,663.94
4. Step 4: Simplify right side
   12,354.50x = 160,155,270.16
5. Step 5: Solve for x
   x = 160,155,270.16/12,354.50
6. Step 6: Final answer
   x = 12,963.31