Finding the Fourth Proportional to 2,456.63, 3,685.91 and 917.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.63 : 3,685.91 = 917.75 : x
2. Step 2: Convert to fraction form
   2,456.63/3,685.91 = 917.75/x
3. Step 3: Cross multiply
   2,456.63x = 3,685.91 × 917.75
4. Step 4: Simplify right side
   2,456.63x = 3,382,739.31
5. Step 5: Solve for x
   x = 3,382,739.31/2,456.63
6. Step 6: Final answer
   x = 1,376.98