Finding the Fourth Proportional to 10,951.80, 15,114.89 and 7,178.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,951.80 : 15,114.89 = 7,178.16 : x
2. Step 2: Convert to fraction form
   10,951.80/15,114.89 = 7,178.16/x
3. Step 3: Cross multiply
   10,951.80x = 15,114.89 × 7,178.16
4. Step 4: Simplify right side
   10,951.80x = 108,497,062.91
5. Step 5: Solve for x
   x = 108,497,062.91/10,951.80
6. Step 6: Final answer
   x = 9,906.78