Finding the Fourth Proportional to 3,109.57, 4,662.96 and 917.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,109.57 : 4,662.96 = 917.53 : x
2. Step 2: Convert to fraction form
   3,109.57/4,662.96 = 917.53/x
3. Step 3: Cross multiply
   3,109.57x = 4,662.96 × 917.53
4. Step 4: Simplify right side
   3,109.57x = 4,278,405.69
5. Step 5: Solve for x
   x = 4,278,405.69/3,109.57
6. Step 6: Final answer
   x = 1,375.88