Finding the Fourth Proportional to 2,147.37, 3,221.22 and 914.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.37 : 3,221.22 = 914.79 : x
2. Step 2: Convert to fraction form
   2,147.37/3,221.22 = 914.79/x
3. Step 3: Cross multiply
   2,147.37x = 3,221.22 × 914.79
4. Step 4: Simplify right side
   2,147.37x = 2,946,732.72
5. Step 5: Solve for x
   x = 2,946,732.72/2,147.37
6. Step 6: Final answer
   x = 1,372.25