Finding the Fourth Proportional to 9,855.56, 14,780.15 and 3,279.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,855.56 : 14,780.15 = 3,279.98 : x
2. Step 2: Convert to fraction form
   9,855.56/14,780.15 = 3,279.98/x
3. Step 3: Cross multiply
   9,855.56x = 14,780.15 × 3,279.98
4. Step 4: Simplify right side
   9,855.56x = 48,478,506.10
5. Step 5: Solve for x
   x = 48,478,506.10/9,855.56
6. Step 6: Final answer
   x = 4,918.90