Finding the Fourth Proportional to 1,271.82, 1,908.18 and 622.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.82 : 1,908.18 = 622.38 : x
2. Step 2: Convert to fraction form
   1,271.82/1,908.18 = 622.38/x
3. Step 3: Cross multiply
   1,271.82x = 1,908.18 × 622.38
4. Step 4: Simplify right side
   1,271.82x = 1,187,613.07
5. Step 5: Solve for x
   x = 1,187,613.07/1,271.82
6. Step 6: Final answer
   x = 933.79