Finding the Fourth Proportional to 10,957.78, 15,116.46 and 7,179.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,957.78 : 15,116.46 = 7,179.27 : x
2. Step 2: Convert to fraction form
   10,957.78/15,116.46 = 7,179.27/x
3. Step 3: Cross multiply
   10,957.78x = 15,116.46 × 7,179.27
4. Step 4: Simplify right side
   10,957.78x = 108,525,064.18
5. Step 5: Solve for x
   x = 108,525,064.18/10,957.78
6. Step 6: Final answer
   x = 9,903.93