Finding the Fourth Proportional to 1,160.88, 1,601.81 and 663.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.88 : 1,601.81 = 663.42 : x
2. Step 2: Convert to fraction form
   1,160.88/1,601.81 = 663.42/x
3. Step 3: Cross multiply
   1,160.88x = 1,601.81 × 663.42
4. Step 4: Simplify right side
   1,160.88x = 1,062,669.47
5. Step 5: Solve for x
   x = 1,062,669.47/1,160.88
6. Step 6: Final answer
   x = 915.40