Finding the Fourth Proportional to 10,921.89, 15,077.94 and 7,355.61

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921.89 : 15,077.94 = 7,355.61 : x
2. Step 2: Convert to fraction form
   10,921.89/15,077.94 = 7,355.61/x
3. Step 3: Cross multiply
   10,921.89x = 15,077.94 × 7,355.61
4. Step 4: Simplify right side
   10,921.89x = 110,907,446.24
5. Step 5: Solve for x
   x = 110,907,446.24/10,921.89
6. Step 6: Final answer
   x = 10,154.60