Finding the Fourth Proportional to 1,160.73, 1,601.78 and 663.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.73 : 1,601.78 = 663.39 : x
2. Step 2: Convert to fraction form
   1,160.73/1,601.78 = 663.39/x
3. Step 3: Cross multiply
   1,160.73x = 1,601.78 × 663.39
4. Step 4: Simplify right side
   1,160.73x = 1,062,601.52
5. Step 5: Solve for x
   x = 1,062,601.52/1,160.73
6. Step 6: Final answer
   x = 915.46