Finding the Fourth Proportional to 7,084.12, 9,775.98 and 4,099.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,084.12 : 9,775.98 = 4,099.72 : x
2. Step 2: Convert to fraction form
   7,084.12/9,775.98 = 4,099.72/x
3. Step 3: Cross multiply
   7,084.12x = 9,775.98 × 4,099.72
4. Step 4: Simplify right side
   7,084.12x = 40,078,780.73
5. Step 5: Solve for x
   x = 40,078,780.73/7,084.12
6. Step 6: Final answer
   x = 5,657.55