Finding the Fourth Proportional to 6,789.98, 10,189.50 and 2,790.65

Step by Step Solution

1. Step 1: Write the proportion equation
   6,789.98 : 10,189.50 = 2,790.65 : x
2. Step 2: Convert to fraction form
   6,789.98/10,189.50 = 2,790.65/x
3. Step 3: Cross multiply
   6,789.98x = 10,189.50 × 2,790.65
4. Step 4: Simplify right side
   6,789.98x = 28,435,298.89
5. Step 5: Solve for x
   x = 28,435,298.89/6,789.98
6. Step 6: Final answer
   x = 4,187.83