Finding the Fourth Proportional to 10,658.72, 14,708.56 and 7,121.44

Step by Step Solution

1. Step 1: Write the proportion equation
   10,658.72 : 14,708.56 = 7,121.44 : x
2. Step 2: Convert to fraction form
   10,658.72/14,708.56 = 7,121.44/x
3. Step 3: Cross multiply
   10,658.72x = 14,708.56 × 7,121.44
4. Step 4: Simplify right side
   10,658.72x = 104,746,127.53
5. Step 5: Solve for x
   x = 104,746,127.53/10,658.72
6. Step 6: Final answer
   x = 9,827.27