Finding the Fourth Proportional to 2,641.68, 3,962.22 and 667.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.68 : 3,962.22 = 667.30 : x
2. Step 2: Convert to fraction form
   2,641.68/3,962.22 = 667.30/x
3. Step 3: Cross multiply
   2,641.68x = 3,962.22 × 667.30
4. Step 4: Simplify right side
   2,641.68x = 2,643,989.41
5. Step 5: Solve for x
   x = 2,643,989.41/2,641.68
6. Step 6: Final answer
   x = 1,000.87