Finding the Fourth Proportional to 9,855.62, 14,779.89 and 3,280.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,855.62 : 14,779.89 = 3,280.04 : x
2. Step 2: Convert to fraction form
   9,855.62/14,779.89 = 3,280.04/x
3. Step 3: Cross multiply
   9,855.62x = 14,779.89 × 3,280.04
4. Step 4: Simplify right side
   9,855.62x = 48,478,630.40
5. Step 5: Solve for x
   x = 48,478,630.40/9,855.62
6. Step 6: Final answer
   x = 4,918.88