Finding the Fourth Proportional to 12,423.72, 17,144.79 and 7,118.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,423.72 : 17,144.79 = 7,118.85 : x
2. Step 2: Convert to fraction form
   12,423.72/17,144.79 = 7,118.85/x
3. Step 3: Cross multiply
   12,423.72x = 17,144.79 × 7,118.85
4. Step 4: Simplify right side
   12,423.72x = 122,051,188.29
5. Step 5: Solve for x
   x = 122,051,188.29/12,423.72
6. Step 6: Final answer
   x = 9,824.05