Finding the Fourth Proportional to 1,677.92, 2,315.67 and 969.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,677.92 : 2,315.67 = 969.89 : x
2. Step 2: Convert to fraction form
   1,677.92/2,315.67 = 969.89/x
3. Step 3: Cross multiply
   1,677.92x = 2,315.67 × 969.89
4. Step 4: Simplify right side
   1,677.92x = 2,245,945.18
5. Step 5: Solve for x
   x = 2,245,945.18/1,677.92
6. Step 6: Final answer
   x = 1,338.53