Finding the Fourth Proportional to 10,085.49, 15,128.34 and 8,323.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,085.49 : 15,128.34 = 8,323.59 : x
2. Step 2: Convert to fraction form
   10,085.49/15,128.34 = 8,323.59/x
3. Step 3: Cross multiply
   10,085.49x = 15,128.34 × 8,323.59
4. Step 4: Simplify right side
   10,085.49x = 125,922,067.64
5. Step 5: Solve for x
   x = 125,922,067.64/10,085.49
6. Step 6: Final answer
   x = 12,485.47