Finding the Fourth Proportional to 1,172.68, 1,617.42 and 730.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.68 : 1,617.42 = 730.15 : x
2. Step 2: Convert to fraction form
   1,172.68/1,617.42 = 730.15/x
3. Step 3: Cross multiply
   1,172.68x = 1,617.42 × 730.15
4. Step 4: Simplify right side
   1,172.68x = 1,180,959.21
5. Step 5: Solve for x
   x = 1,180,959.21/1,172.68
6. Step 6: Final answer
   x = 1,007.06