Finding the Fourth Proportional to 1,235.78, 1,705.33 and 676.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,235.78 : 1,705.33 = 676.24 : x
2. Step 2: Convert to fraction form
   1,235.78/1,705.33 = 676.24/x
3. Step 3: Cross multiply
   1,235.78x = 1,705.33 × 676.24
4. Step 4: Simplify right side
   1,235.78x = 1,153,200.45
5. Step 5: Solve for x
   x = 1,153,200.45/1,235.78
6. Step 6: Final answer
   x = 933.18