Finding the Fourth Proportional to 10,678.58, 14,743.37 and 9,557.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,678.58 : 14,743.37 = 9,557.57 : x
2. Step 2: Convert to fraction form
   10,678.58/14,743.37 = 9,557.57/x
3. Step 3: Cross multiply
   10,678.58x = 14,743.37 × 9,557.57
4. Step 4: Simplify right side
   10,678.58x = 140,910,851.56
5. Step 5: Solve for x
   x = 140,910,851.56/10,678.58
6. Step 6: Final answer
   x = 13,195.66