Finding the Fourth Proportional to 2,644.68, 3,966.72 and 670.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,644.68 : 3,966.72 = 670.30 : x
2. Step 2: Convert to fraction form
   2,644.68/3,966.72 = 670.30/x
3. Step 3: Cross multiply
   2,644.68x = 3,966.72 × 670.30
4. Step 4: Simplify right side
   2,644.68x = 2,658,892.42
5. Step 5: Solve for x
   x = 2,658,892.42/2,644.68
6. Step 6: Final answer
   x = 1,005.37