Finding the Fourth Proportional to 10,561.47, 14,556.51 and 9,208.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,561.47 : 14,556.51 = 9,208.59 : x
2. Step 2: Convert to fraction form
   10,561.47/14,556.51 = 9,208.59/x
3. Step 3: Cross multiply
   10,561.47x = 14,556.51 × 9,208.59
4. Step 4: Simplify right side
   10,561.47x = 134,044,932.42
5. Step 5: Solve for x
   x = 134,044,932.42/10,561.47
6. Step 6: Final answer
   x = 12,691.88