Finding the Fourth Proportional to 2,147.03, 3,221.76 and 914.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.03 : 3,221.76 = 914.31 : x
2. Step 2: Convert to fraction form
   2,147.03/3,221.76 = 914.31/x
3. Step 3: Cross multiply
   2,147.03x = 3,221.76 × 914.31
4. Step 4: Simplify right side
   2,147.03x = 2,945,685.67
5. Step 5: Solve for x
   x = 2,945,685.67/2,147.03
6. Step 6: Final answer
   x = 1,371.98