Finding the Fourth Proportional to 9,929.34, 14,885.10 and 5,480.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,929.34 : 14,885.10 = 5,480.28 : x
2. Step 2: Convert to fraction form
   9,929.34/14,885.10 = 5,480.28/x
3. Step 3: Cross multiply
   9,929.34x = 14,885.10 × 5,480.28
4. Step 4: Simplify right side
   9,929.34x = 81,574,515.83
5. Step 5: Solve for x
   x = 81,574,515.83/9,929.34
6. Step 6: Final answer
   x = 8,215.50