Finding the Fourth Proportional to 1,003.75, 1,385.42 and 611.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.75 : 1,385.42 = 611.10 : x
2. Step 2: Convert to fraction form
   1,003.75/1,385.42 = 611.10/x
3. Step 3: Cross multiply
   1,003.75x = 1,385.42 × 611.10
4. Step 4: Simplify right side
   1,003.75x = 846,630.16
5. Step 5: Solve for x
   x = 846,630.16/1,003.75
6. Step 6: Final answer
   x = 843.47