Finding the Fourth Proportional to 1,160.76, 1,601.78 and 663.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.76 : 1,601.78 = 663.46 : x
2. Step 2: Convert to fraction form
   1,160.76/1,601.78 = 663.46/x
3. Step 3: Cross multiply
   1,160.76x = 1,601.78 × 663.46
4. Step 4: Simplify right side
   1,160.76x = 1,062,716.96
5. Step 5: Solve for x
   x = 1,062,716.96/1,160.76
6. Step 6: Final answer
   x = 915.54