Finding the Fourth Proportional to 10,921.53, 16,390.50 and 7,222.44

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921.53 : 16,390.50 = 7,222.44 : x
2. Step 2: Convert to fraction form
   10,921.53/16,390.50 = 7,222.44/x
3. Step 3: Cross multiply
   10,921.53x = 16,390.50 × 7,222.44
4. Step 4: Simplify right side
   10,921.53x = 118,379,402.82
5. Step 5: Solve for x
   x = 118,379,402.82/10,921.53
6. Step 6: Final answer
   x = 10,839.09