Finding the Fourth Proportional to 1,160.93, 1,601.86 and 663.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.93 : 1,601.86 = 663.56 : x
2. Step 2: Convert to fraction form
   1,160.93/1,601.86 = 663.56/x
3. Step 3: Cross multiply
   1,160.93x = 1,601.86 × 663.56
4. Step 4: Simplify right side
   1,160.93x = 1,062,933.98
5. Step 5: Solve for x
   x = 1,062,933.98/1,160.93
6. Step 6: Final answer
   x = 915.59