Finding the Fourth Proportional to 1,002.96, 1,383.78 and 609.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.96 : 1,383.78 = 609.84 : x
2. Step 2: Convert to fraction form
   1,002.96/1,383.78 = 609.84/x
3. Step 3: Cross multiply
   1,002.96x = 1,383.78 × 609.84
4. Step 4: Simplify right side
   1,002.96x = 843,884.40
5. Step 5: Solve for x
   x = 843,884.40/1,002.96
6. Step 6: Final answer
   x = 841.39