Finding the Fourth Proportional to 10,908.27, 15,057.80 and 7,134.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,908.27 : 15,057.80 = 7,134.78 : x
2. Step 2: Convert to fraction form
   10,908.27/15,057.80 = 7,134.78/x
3. Step 3: Cross multiply
   10,908.27x = 15,057.80 × 7,134.78
4. Step 4: Simplify right side
   10,908.27x = 107,434,137.83
5. Step 5: Solve for x
   x = 107,434,137.83/10,908.27
6. Step 6: Final answer
   x = 9,848.87