Finding the Fourth Proportional to 2,002.78, 3,001.73 and 906.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,002.78 : 3,001.73 = 906.04 : x
2. Step 2: Convert to fraction form
   2,002.78/3,001.73 = 906.04/x
3. Step 3: Cross multiply
   2,002.78x = 3,001.73 × 906.04
4. Step 4: Simplify right side
   2,002.78x = 2,719,687.45
5. Step 5: Solve for x
   x = 2,719,687.45/2,002.78
6. Step 6: Final answer
   x = 1,357.96