Finding the Fourth Proportional to 2,149.58, 3,222.27 and 917.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,149.58 : 3,222.27 = 917.30 : x
2. Step 2: Convert to fraction form
   2,149.58/3,222.27 = 917.30/x
3. Step 3: Cross multiply
   2,149.58x = 3,222.27 × 917.30
4. Step 4: Simplify right side
   2,149.58x = 2,955,772.16
5. Step 5: Solve for x
   x = 2,955,772.16/2,149.58
6. Step 6: Final answer
   x = 1,375.05