Finding the Fourth Proportional to 5,100.67, 7,039.11 and 3,109.83

Step by Step Solution

1. Step 1: Write the proportion equation
   5,100.67 : 7,039.11 = 3,109.83 : x
2. Step 2: Convert to fraction form
   5,100.67/7,039.11 = 3,109.83/x
3. Step 3: Cross multiply
   5,100.67x = 7,039.11 × 3,109.83
4. Step 4: Simplify right side
   5,100.67x = 21,890,435.45
5. Step 5: Solve for x
   x = 21,890,435.45/5,100.67
6. Step 6: Final answer
   x = 4,291.68