Finding the Fourth Proportional to 1,196.70, 1,651.32 and 665.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.70 : 1,651.32 = 665.58 : x
2. Step 2: Convert to fraction form
   1,196.70/1,651.32 = 665.58/x
3. Step 3: Cross multiply
   1,196.70x = 1,651.32 × 665.58
4. Step 4: Simplify right side
   1,196.70x = 1,099,085.57
5. Step 5: Solve for x
   x = 1,099,085.57/1,196.70
6. Step 6: Final answer
   x = 918.43