Finding the Fourth Proportional to 1,172.72, 1,758.28 and 848.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.72 : 1,758.28 = 848.72 : x
2. Step 2: Convert to fraction form
   1,172.72/1,758.28 = 848.72/x
3. Step 3: Cross multiply
   1,172.72x = 1,758.28 × 848.72
4. Step 4: Simplify right side
   1,172.72x = 1,492,287.40
5. Step 5: Solve for x
   x = 1,492,287.40/1,172.72
6. Step 6: Final answer
   x = 1,272.50