Finding the Fourth Proportional to 1,172.84, 1,618.72 and 675.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.84 : 1,618.72 = 675.39 : x
2. Step 2: Convert to fraction form
   1,172.84/1,618.72 = 675.39/x
3. Step 3: Cross multiply
   1,172.84x = 1,618.72 × 675.39
4. Step 4: Simplify right side
   1,172.84x = 1,093,267.30
5. Step 5: Solve for x
   x = 1,093,267.30/1,172.84
6. Step 6: Final answer
   x = 932.15