Finding the Fourth Proportional to 1,196.42, 1,791.72 and 989.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.42 : 1,791.72 = 989.46 : x
2. Step 2: Convert to fraction form
   1,196.42/1,791.72 = 989.46/x
3. Step 3: Cross multiply
   1,196.42x = 1,791.72 × 989.46
4. Step 4: Simplify right side
   1,196.42x = 1,772,835.27
5. Step 5: Solve for x
   x = 1,772,835.27/1,196.42
6. Step 6: Final answer
   x = 1,481.79