Finding the Fourth Proportional to 2,377.27, 3,565.91 and 645.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,377.27 : 3,565.91 = 645.89 : x
2. Step 2: Convert to fraction form
   2,377.27/3,565.91 = 645.89/x
3. Step 3: Cross multiply
   2,377.27x = 3,565.91 × 645.89
4. Step 4: Simplify right side
   2,377.27x = 2,303,185.82
5. Step 5: Solve for x
   x = 2,303,185.82/2,377.27
6. Step 6: Final answer
   x = 968.84