Finding the Fourth Proportional to 7,086.67, 9,779.69 and 3,900.33

Step by Step Solution

1. Step 1: Write the proportion equation
   7,086.67 : 9,779.69 = 3,900.33 : x
2. Step 2: Convert to fraction form
   7,086.67/9,779.69 = 3,900.33/x
3. Step 3: Cross multiply
   7,086.67x = 9,779.69 × 3,900.33
4. Step 4: Simplify right side
   7,086.67x = 38,143,974.35
5. Step 5: Solve for x
   x = 38,143,974.35/7,086.67
6. Step 6: Final answer
   x = 5,382.50