Finding the Fourth Proportional to 2,002.39, 3,003.53 and 905.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,002.39 : 3,003.53 = 905.99 : x
2. Step 2: Convert to fraction form
   2,002.39/3,003.53 = 905.99/x
3. Step 3: Cross multiply
   2,002.39x = 3,003.53 × 905.99
4. Step 4: Simplify right side
   2,002.39x = 2,721,148.60
5. Step 5: Solve for x
   x = 2,721,148.60/2,002.39
6. Step 6: Final answer
   x = 1,358.95