Finding the Fourth Proportional to 1,155.65, 1,736.61 and 608.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.65 : 1,736.61 = 608.09 : x
2. Step 2: Convert to fraction form
   1,155.65/1,736.61 = 608.09/x
3. Step 3: Cross multiply
   1,155.65x = 1,736.61 × 608.09
4. Step 4: Simplify right side
   1,155.65x = 1,056,010.83
5. Step 5: Solve for x
   x = 1,056,010.83/1,155.65
6. Step 6: Final answer
   x = 913.78