Finding the Fourth Proportional to 2,147.72, 3,218.82 and 914.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.72 : 3,218.82 = 914.79 : x
2. Step 2: Convert to fraction form
   2,147.72/3,218.82 = 914.79/x
3. Step 3: Cross multiply
   2,147.72x = 3,218.82 × 914.79
4. Step 4: Simplify right side
   2,147.72x = 2,944,544.35
5. Step 5: Solve for x
   x = 2,944,544.35/2,147.72
6. Step 6: Final answer
   x = 1,371.01