Finding the Fourth Proportional to 10,768.78, 14,872.17 and 7,420.24

Step by Step Solution

1. Step 1: Write the proportion equation
   10,768.78 : 14,872.17 = 7,420.24 : x
2. Step 2: Convert to fraction form
   10,768.78/14,872.17 = 7,420.24/x
3. Step 3: Cross multiply
   10,768.78x = 14,872.17 × 7,420.24
4. Step 4: Simplify right side
   10,768.78x = 110,355,070.72
5. Step 5: Solve for x
   x = 110,355,070.72/10,768.78
6. Step 6: Final answer
   x = 10,247.69