Finding the Fourth Proportional to 1,237.38, 1,707.59 and 677.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,237.38 : 1,707.59 = 677.89 : x
2. Step 2: Convert to fraction form
   1,237.38/1,707.59 = 677.89/x
3. Step 3: Cross multiply
   1,237.38x = 1,707.59 × 677.89
4. Step 4: Simplify right side
   1,237.38x = 1,157,564.91
5. Step 5: Solve for x
   x = 1,157,564.91/1,237.38
6. Step 6: Final answer
   x = 935.49