Finding the Fourth Proportional to 9,423.91, 12,993.56 and 8,145.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,423.91 : 12,993.56 = 8,145.48 : x
2. Step 2: Convert to fraction form
   9,423.91/12,993.56 = 8,145.48/x
3. Step 3: Cross multiply
   9,423.91x = 12,993.56 × 8,145.48
4. Step 4: Simplify right side
   9,423.91x = 105,838,783.11
5. Step 5: Solve for x
   x = 105,838,783.11/9,423.91
6. Step 6: Final answer
   x = 11,230.88