Finding the Fourth Proportional to 7,086.83, 9,779.87 and 3,900.04

Step by Step Solution

1. Step 1: Write the proportion equation
   7,086.83 : 9,779.87 = 3,900.04 : x
2. Step 2: Convert to fraction form
   7,086.83/9,779.87 = 3,900.04/x
3. Step 3: Cross multiply
   7,086.83x = 9,779.87 × 3,900.04
4. Step 4: Simplify right side
   7,086.83x = 38,141,884.19
5. Step 5: Solve for x
   x = 38,141,884.19/7,086.83
6. Step 6: Final answer
   x = 5,382.08