Finding the Fourth Proportional to 1,003.84, 1,385.42 and 610.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.84 : 1,385.42 = 610.92 : x
2. Step 2: Convert to fraction form
   1,003.84/1,385.42 = 610.92/x
3. Step 3: Cross multiply
   1,003.84x = 1,385.42 × 610.92
4. Step 4: Simplify right side
   1,003.84x = 846,380.79
5. Step 5: Solve for x
   x = 846,380.79/1,003.84
6. Step 6: Final answer
   x = 843.14