Finding the Fourth Proportional to 1,160.72, 1,601.90 and 663.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.72 : 1,601.90 = 663.52 : x
2. Step 2: Convert to fraction form
   1,160.72/1,601.90 = 663.52/x
3. Step 3: Cross multiply
   1,160.72x = 1,601.90 × 663.52
4. Step 4: Simplify right side
   1,160.72x = 1,062,892.69
5. Step 5: Solve for x
   x = 1,062,892.69/1,160.72
6. Step 6: Final answer
   x = 915.72