Finding the Fourth Proportional to 9,660.72, 14,497.58 and 3,420.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,660.72 : 14,497.58 = 3,420.72 : x
2. Step 2: Convert to fraction form
   9,660.72/14,497.58 = 3,420.72/x
3. Step 3: Cross multiply
   9,660.72x = 14,497.58 × 3,420.72
4. Step 4: Simplify right side
   9,660.72x = 49,592,161.86
5. Step 5: Solve for x
   x = 49,592,161.86/9,660.72
6. Step 6: Final answer
   x = 5,133.38