Finding the Fourth Proportional to 1,160.42, 1,601.34 and 636.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.42 : 1,601.34 = 636.48 : x
2. Step 2: Convert to fraction form
   1,160.42/1,601.34 = 636.48/x
3. Step 3: Cross multiply
   1,160.42x = 1,601.34 × 636.48
4. Step 4: Simplify right side
   1,160.42x = 1,019,220.88
5. Step 5: Solve for x
   x = 1,019,220.88/1,160.42
6. Step 6: Final answer
   x = 878.32