Finding the Fourth Proportional to 1,160.43, 1,601.39 and 636.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.43 : 1,601.39 = 636.46 : x
2. Step 2: Convert to fraction form
   1,160.43/1,601.39 = 636.46/x
3. Step 3: Cross multiply
   1,160.43x = 1,601.39 × 636.46
4. Step 4: Simplify right side
   1,160.43x = 1,019,217.50
5. Step 5: Solve for x
   x = 1,019,217.50/1,160.43
6. Step 6: Final answer
   x = 878.31