Finding the Fourth Proportional to 2,148.21, 3,222.15 and 667.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,148.21 : 3,222.15 = 667.39 : x
2. Step 2: Convert to fraction form
   2,148.21/3,222.15 = 667.39/x
3. Step 3: Cross multiply
   2,148.21x = 3,222.15 × 667.39
4. Step 4: Simplify right side
   2,148.21x = 2,150,422.63
5. Step 5: Solve for x
   x = 2,150,422.63/2,148.21
6. Step 6: Final answer
   x = 1,001.03