Finding the Fourth Proportional to 10,118.76, 15,146.73 and 9,257.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,118.76 : 15,146.73 = 9,257.55 : x
2. Step 2: Convert to fraction form
   10,118.76/15,146.73 = 9,257.55/x
3. Step 3: Cross multiply
   10,118.76x = 15,146.73 × 9,257.55
4. Step 4: Simplify right side
   10,118.76x = 140,221,610.31
5. Step 5: Solve for x
   x = 140,221,610.31/10,118.76
6. Step 6: Final answer
   x = 13,857.59