Finding the Fourth Proportional to 1,172.27, 1,757.52 and 578.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.27 : 1,757.52 = 578.94 : x
2. Step 2: Convert to fraction form
   1,172.27/1,757.52 = 578.94/x
3. Step 3: Cross multiply
   1,172.27x = 1,757.52 × 578.94
4. Step 4: Simplify right side
   1,172.27x = 1,017,498.63
5. Step 5: Solve for x
   x = 1,017,498.63/1,172.27
6. Step 6: Final answer
   x = 867.98