Finding the Fourth Proportional to 10,921.89, 15,056.94 and 9,236.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921.89 : 15,056.94 = 9,236.52 : x
2. Step 2: Convert to fraction form
   10,921.89/15,056.94 = 9,236.52/x
3. Step 3: Cross multiply
   10,921.89x = 15,056.94 × 9,236.52
4. Step 4: Simplify right side
   10,921.89x = 139,073,727.45
5. Step 5: Solve for x
   x = 139,073,727.45/10,921.89
6. Step 6: Final answer
   x = 12,733.49