Finding the Fourth Proportional to 2,150.15, 3,225.56 and 917.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.15 : 3,225.56 = 917.57 : x
2. Step 2: Convert to fraction form
   2,150.15/3,225.56 = 917.57/x
3. Step 3: Cross multiply
   2,150.15x = 3,225.56 × 917.57
4. Step 4: Simplify right side
   2,150.15x = 2,959,660.96
5. Step 5: Solve for x
   x = 2,959,660.96/2,150.15
6. Step 6: Final answer
   x = 1,376.49