Finding the Fourth Proportional to 1,646.38, 2,272.22 and 938.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,646.38 : 2,272.22 = 938.25 : x
2. Step 2: Convert to fraction form
   1,646.38/2,272.22 = 938.25/x
3. Step 3: Cross multiply
   1,646.38x = 2,272.22 × 938.25
4. Step 4: Simplify right side
   1,646.38x = 2,131,910.42
5. Step 5: Solve for x
   x = 2,131,910.42/1,646.38
6. Step 6: Final answer
   x = 1,294.91