Finding the Fourth Proportional to 10,821.78, 14,940.36 and 7,469.46

Step by Step Solution

1. Step 1: Write the proportion equation
   10,821.78 : 14,940.36 = 7,469.46 : x
2. Step 2: Convert to fraction form
   10,821.78/14,940.36 = 7,469.46/x
3. Step 3: Cross multiply
   10,821.78x = 14,940.36 × 7,469.46
4. Step 4: Simplify right side
   10,821.78x = 111,596,421.41
5. Step 5: Solve for x
   x = 111,596,421.41/10,821.78
6. Step 6: Final answer
   x = 10,312.21