Finding the Fourth Proportional to 1,160.40, 1,601.34 and 663.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.40 : 1,601.34 = 663.06 : x
2. Step 2: Convert to fraction form
   1,160.40/1,601.34 = 663.06/x
3. Step 3: Cross multiply
   1,160.40x = 1,601.34 × 663.06
4. Step 4: Simplify right side
   1,160.40x = 1,061,784.50
5. Step 5: Solve for x
   x = 1,061,784.50/1,160.40
6. Step 6: Final answer
   x = 915.02