Finding the Fourth Proportional to 2,644.16, 3,965.70 and 1,238.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,644.16 : 3,965.70 = 1,238.18 : x
2. Step 2: Convert to fraction form
   2,644.16/3,965.70 = 1,238.18/x
3. Step 3: Cross multiply
   2,644.16x = 3,965.70 × 1,238.18
4. Step 4: Simplify right side
   2,644.16x = 4,910,250.43
5. Step 5: Solve for x
   x = 4,910,250.43/2,644.16
6. Step 6: Final answer
   x = 1,857.02