Finding the Fourth Proportional to 2,145.73, 3,218.56 and 606.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.73 : 3,218.56 = 606.73 : x
2. Step 2: Convert to fraction form
   2,145.73/3,218.56 = 606.73/x
3. Step 3: Cross multiply
   2,145.73x = 3,218.56 × 606.73
4. Step 4: Simplify right side
   2,145.73x = 1,952,796.91
5. Step 5: Solve for x
   x = 1,952,796.91/2,145.73
6. Step 6: Final answer
   x = 910.09