Finding the Fourth Proportional to 9,920, 14,871.52 and 4,072.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920 : 14,871.52 = 4,072.96 : x
2. Step 2: Convert to fraction form
   9,920/14,871.52 = 4,072.96/x
3. Step 3: Cross multiply
   9,920x = 14,871.52 × 4,072.96
4. Step 4: Simplify right side
   9,920x = 60,571,106.10
5. Step 5: Solve for x
   x = 60,571,106.10/9,920
6. Step 6: Final answer
   x = 6,105.96