Finding the Fourth Proportional to 10,921.23, 15,056.04 and 9,235.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921.23 : 15,056.04 = 9,235.86 : x
2. Step 2: Convert to fraction form
   10,921.23/15,056.04 = 9,235.86/x
3. Step 3: Cross multiply
   10,921.23x = 15,056.04 × 9,235.86
4. Step 4: Simplify right side
   10,921.23x = 139,055,477.59
5. Step 5: Solve for x
   x = 139,055,477.59/10,921.23
6. Step 6: Final answer
   x = 12,732.58