Finding the Fourth Proportional to 1,196.78, 1,651.59 and 699.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.78 : 1,651.59 = 699.17 : x
2. Step 2: Convert to fraction form
   1,196.78/1,651.59 = 699.17/x
3. Step 3: Cross multiply
   1,196.78x = 1,651.59 × 699.17
4. Step 4: Simplify right side
   1,196.78x = 1,154,733.92
5. Step 5: Solve for x
   x = 1,154,733.92/1,196.78
6. Step 6: Final answer
   x = 964.87