Finding the Fourth Proportional to 1,008.83, 1,392.73 and 610.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.83 : 1,392.73 = 610.56 : x
2. Step 2: Convert to fraction form
   1,008.83/1,392.73 = 610.56/x
3. Step 3: Cross multiply
   1,008.83x = 1,392.73 × 610.56
4. Step 4: Simplify right side
   1,008.83x = 850,338.27
5. Step 5: Solve for x
   x = 850,338.27/1,008.83
6. Step 6: Final answer
   x = 842.90