Finding the Fourth Proportional to 1,160.76, 1,601.88 and 663.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.76 : 1,601.88 = 663.48 : x
2. Step 2: Convert to fraction form
   1,160.76/1,601.88 = 663.48/x
3. Step 3: Cross multiply
   1,160.76x = 1,601.88 × 663.48
4. Step 4: Simplify right side
   1,160.76x = 1,062,815.34
5. Step 5: Solve for x
   x = 1,062,815.34/1,160.76
6. Step 6: Final answer
   x = 915.62