Finding the Fourth Proportional to 13,725.76, 18,942.52 and 7,757.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,725.76 : 18,942.52 = 7,757.98 : x
2. Step 2: Convert to fraction form
   13,725.76/18,942.52 = 7,757.98/x
3. Step 3: Cross multiply
   13,725.76x = 18,942.52 × 7,757.98
4. Step 4: Simplify right side
   13,725.76x = 146,955,691.31
5. Step 5: Solve for x
   x = 146,955,691.31/13,725.76
6. Step 6: Final answer
   x = 10,706.56