Finding the Fourth Proportional to 1,003.57, 1,384.54 and 605.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.57 : 1,384.54 = 605.35 : x
2. Step 2: Convert to fraction form
   1,003.57/1,384.54 = 605.35/x
3. Step 3: Cross multiply
   1,003.57x = 1,384.54 × 605.35
4. Step 4: Simplify right side
   1,003.57x = 838,131.29
5. Step 5: Solve for x
   x = 838,131.29/1,003.57
6. Step 6: Final answer
   x = 835.15