Finding the Fourth Proportional to 3,871.99, 5,810.01 and 2,118.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,871.99 : 5,810.01 = 2,118.25 : x
2. Step 2: Convert to fraction form
   3,871.99/5,810.01 = 2,118.25/x
3. Step 3: Cross multiply
   3,871.99x = 5,810.01 × 2,118.25
4. Step 4: Simplify right side
   3,871.99x = 12,307,053.68
5. Step 5: Solve for x
   x = 12,307,053.68/3,871.99
6. Step 6: Final answer
   x = 3,178.48