Finding the Fourth Proportional to 1,172.35, 1,618.01 and 674.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.35 : 1,618.01 = 674.81 : x
2. Step 2: Convert to fraction form
   1,172.35/1,618.01 = 674.81/x
3. Step 3: Cross multiply
   1,172.35x = 1,618.01 × 674.81
4. Step 4: Simplify right side
   1,172.35x = 1,091,849.33
5. Step 5: Solve for x
   x = 1,091,849.33/1,172.35
6. Step 6: Final answer
   x = 931.33