Finding the Fourth Proportional to 1,160.82, 1,601.87 and 636.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.82 : 1,601.87 = 636.84 : x
2. Step 2: Convert to fraction form
   1,160.82/1,601.87 = 636.84/x
3. Step 3: Cross multiply
   1,160.82x = 1,601.87 × 636.84
4. Step 4: Simplify right side
   1,160.82x = 1,020,128.47
5. Step 5: Solve for x
   x = 1,020,128.47/1,160.82
6. Step 6: Final answer
   x = 878.80