Finding the Fourth Proportional to 3,871.02, 5,801.31 and 2,111.70

Step by Step Solution

1. Step 1: Write the proportion equation
   3,871.02 : 5,801.31 = 2,111.70 : x
2. Step 2: Convert to fraction form
   3,871.02/5,801.31 = 2,111.70/x
3. Step 3: Cross multiply
   3,871.02x = 5,801.31 × 2,111.70
4. Step 4: Simplify right side
   3,871.02x = 12,250,626.33
5. Step 5: Solve for x
   x = 12,250,626.33/3,871.02
6. Step 6: Final answer
   x = 3,164.70