Finding the Fourth Proportional to 12,144.79, 18,211.92 and 5,127.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,144.79 : 18,211.92 = 5,127.94 : x
2. Step 2: Convert to fraction form
   12,144.79/18,211.92 = 5,127.94/x
3. Step 3: Cross multiply
   12,144.79x = 18,211.92 × 5,127.94
4. Step 4: Simplify right side
   12,144.79x = 93,389,633.04
5. Step 5: Solve for x
   x = 93,389,633.04/12,144.79
6. Step 6: Final answer
   x = 7,689.69