Finding the Fourth Proportional to 1,172.72, 1,619.10 and 753.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.72 : 1,619.10 = 753.25 : x
2. Step 2: Convert to fraction form
   1,172.72/1,619.10 = 753.25/x
3. Step 3: Cross multiply
   1,172.72x = 1,619.10 × 753.25
4. Step 4: Simplify right side
   1,172.72x = 1,219,583.03
5. Step 5: Solve for x
   x = 1,219,583.03/1,172.72
6. Step 6: Final answer
   x = 1,039.97