Finding the Fourth Proportional to 1,160.50, 1,601.44 and 663.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.50 : 1,601.44 = 663.12 : x
2. Step 2: Convert to fraction form
   1,160.50/1,601.44 = 663.12/x
3. Step 3: Cross multiply
   1,160.50x = 1,601.44 × 663.12
4. Step 4: Simplify right side
   1,160.50x = 1,061,946.89
5. Step 5: Solve for x
   x = 1,061,946.89/1,160.50
6. Step 6: Final answer
   x = 915.08