Finding the Fourth Proportional to 13,725.78, 18,944.31 and 7,757.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,725.78 : 18,944.31 = 7,757.52 : x
2. Step 2: Convert to fraction form
   13,725.78/18,944.31 = 7,757.52/x
3. Step 3: Cross multiply
   13,725.78x = 18,944.31 × 7,757.52
4. Step 4: Simplify right side
   13,725.78x = 146,960,863.71
5. Step 5: Solve for x
   x = 146,960,863.71/13,725.78
6. Step 6: Final answer
   x = 10,706.92