Finding the Fourth Proportional to 1,607.43, 2,218.28 and 908.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,607.43 : 2,218.28 = 908.82 : x
2. Step 2: Convert to fraction form
   1,607.43/2,218.28 = 908.82/x
3. Step 3: Cross multiply
   1,607.43x = 2,218.28 × 908.82
4. Step 4: Simplify right side
   1,607.43x = 2,016,012.69
5. Step 5: Solve for x
   x = 2,016,012.69/1,607.43
6. Step 6: Final answer
   x = 1,254.18