Finding the Fourth Proportional to 1,003.59, 1,501.89 and 613.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.59 : 1,501.89 = 613.42 : x
2. Step 2: Convert to fraction form
   1,003.59/1,501.89 = 613.42/x
3. Step 3: Cross multiply
   1,003.59x = 1,501.89 × 613.42
4. Step 4: Simplify right side
   1,003.59x = 921,295.21
5. Step 5: Solve for x
   x = 921,295.21/1,003.59
6. Step 6: Final answer
   x = 918.00