Finding the Fourth Proportional to 728.86, 1,010.82 and 667.35

Step by Step Solution

1. Step 1: Write the proportion equation
   728.86 : 1,010.82 = 667.35 : x
2. Step 2: Convert to fraction form
   728.86/1,010.82 = 667.35/x
3. Step 3: Cross multiply
   728.86x = 1,010.82 × 667.35
4. Step 4: Simplify right side
   728.86x = 674,570.73
5. Step 5: Solve for x
   x = 674,570.73/728.86
6. Step 6: Final answer
   x = 925.51