Finding the Fourth Proportional to 3,423.87, 5,131.89 and 2,808.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,423.87 : 5,131.89 = 2,808.81 : x
2. Step 2: Convert to fraction form
   3,423.87/5,131.89 = 2,808.81/x
3. Step 3: Cross multiply
   3,423.87x = 5,131.89 × 2,808.81
4. Step 4: Simplify right side
   3,423.87x = 14,414,503.95
5. Step 5: Solve for x
   x = 14,414,503.95/3,423.87
6. Step 6: Final answer
   x = 4,210.00