Finding the Fourth Proportional to 1,160.39, 1,601.18 and 662.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.39 : 1,601.18 = 662.90 : x
2. Step 2: Convert to fraction form
   1,160.39/1,601.18 = 662.90/x
3. Step 3: Cross multiply
   1,160.39x = 1,601.18 × 662.90
4. Step 4: Simplify right side
   1,160.39x = 1,061,410.90
5. Step 5: Solve for x
   x = 1,061,410.90/1,160.39
6. Step 6: Final answer
   x = 914.71