Finding the Fourth Proportional to 1,196.78, 1,651.55 and 699.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.78 : 1,651.55 = 699.31 : x
2. Step 2: Convert to fraction form
   1,196.78/1,651.55 = 699.31/x
3. Step 3: Cross multiply
   1,196.78x = 1,651.55 × 699.31
4. Step 4: Simplify right side
   1,196.78x = 1,154,950.30
5. Step 5: Solve for x
   x = 1,154,950.30/1,196.78
6. Step 6: Final answer
   x = 965.05