Finding the Fourth Proportional to 1,606.78, 2,217.30 and 908.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,606.78 : 2,217.30 = 908.14 : x
2. Step 2: Convert to fraction form
   1,606.78/2,217.30 = 908.14/x
3. Step 3: Cross multiply
   1,606.78x = 2,217.30 × 908.14
4. Step 4: Simplify right side
   1,606.78x = 2,013,618.82
5. Step 5: Solve for x
   x = 2,013,618.82/1,606.78
6. Step 6: Final answer
   x = 1,253.20