Finding the Fourth Proportional to 10,709.28, 14,786.64 and 7,731.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,709.28 : 14,786.64 = 7,731.72 : x
2. Step 2: Convert to fraction form
   10,709.28/14,786.64 = 7,731.72/x
3. Step 3: Cross multiply
   10,709.28x = 14,786.64 × 7,731.72
4. Step 4: Simplify right side
   10,709.28x = 114,326,160.22
5. Step 5: Solve for x
   x = 114,326,160.22/10,709.28
6. Step 6: Final answer
   x = 10,675.43