Finding the Fourth Proportional to 1,160.25, 1,601.22 and 663.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.25 : 1,601.22 = 663.05 : x
2. Step 2: Convert to fraction form
   1,160.25/1,601.22 = 663.05/x
3. Step 3: Cross multiply
   1,160.25x = 1,601.22 × 663.05
4. Step 4: Simplify right side
   1,160.25x = 1,061,680.91
5. Step 5: Solve for x
   x = 1,061,680.91/1,160.25
6. Step 6: Final answer
   x = 915.04