Finding the Fourth Proportional to 1,160.39, 1,601.17 and 662.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.39 : 1,601.17 = 662.99 : x
2. Step 2: Convert to fraction form
   1,160.39/1,601.17 = 662.99/x
3. Step 3: Cross multiply
   1,160.39x = 1,601.17 × 662.99
4. Step 4: Simplify right side
   1,160.39x = 1,061,550.03
5. Step 5: Solve for x
   x = 1,061,550.03/1,160.39
6. Step 6: Final answer
   x = 914.82