Finding the Fourth Proportional to 1,155.72, 1,734.52 and 608.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.72 : 1,734.52 = 608.42 : x
2. Step 2: Convert to fraction form
   1,155.72/1,734.52 = 608.42/x
3. Step 3: Cross multiply
   1,155.72x = 1,734.52 × 608.42
4. Step 4: Simplify right side
   1,155.72x = 1,055,316.66
5. Step 5: Solve for x
   x = 1,055,316.66/1,155.72
6. Step 6: Final answer
   x = 913.12