Finding the Fourth Proportional to 1,160.49, 1,601.49 and 663.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.49 : 1,601.49 = 663.15 : x
2. Step 2: Convert to fraction form
   1,160.49/1,601.49 = 663.15/x
3. Step 3: Cross multiply
   1,160.49x = 1,601.49 × 663.15
4. Step 4: Simplify right side
   1,160.49x = 1,062,028.35
5. Step 5: Solve for x
   x = 1,062,028.35/1,160.49
6. Step 6: Final answer
   x = 915.15