Finding the Fourth Proportional to 3,671.21, 5,067.15 and 2,100.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,671.21 : 5,067.15 = 2,100.22 : x
2. Step 2: Convert to fraction form
   3,671.21/5,067.15 = 2,100.22/x
3. Step 3: Cross multiply
   3,671.21x = 5,067.15 × 2,100.22
4. Step 4: Simplify right side
   3,671.21x = 10,642,129.77
5. Step 5: Solve for x
   x = 10,642,129.77/3,671.21
6. Step 6: Final answer
   x = 2,898.81