Finding the Fourth Proportional to 1,104.96, 1,654.68 and 641.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.96 : 1,654.68 = 641.58 : x
2. Step 2: Convert to fraction form
   1,104.96/1,654.68 = 641.58/x
3. Step 3: Cross multiply
   1,104.96x = 1,654.68 × 641.58
4. Step 4: Simplify right side
   1,104.96x = 1,061,609.59
5. Step 5: Solve for x
   x = 1,061,609.59/1,104.96
6. Step 6: Final answer
   x = 960.77