Finding the Fourth Proportional to 1,172.69, 1,618.13 and 675.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.69 : 1,618.13 = 675.35 : x
2. Step 2: Convert to fraction form
   1,172.69/1,618.13 = 675.35/x
3. Step 3: Cross multiply
   1,172.69x = 1,618.13 × 675.35
4. Step 4: Simplify right side
   1,172.69x = 1,092,804.10
5. Step 5: Solve for x
   x = 1,092,804.10/1,172.69
6. Step 6: Final answer
   x = 931.88