Finding the Fourth Proportional to 1,172.58, 1,617.77 and 675.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.58 : 1,617.77 = 675.05 : x
2. Step 2: Convert to fraction form
   1,172.58/1,617.77 = 675.05/x
3. Step 3: Cross multiply
   1,172.58x = 1,617.77 × 675.05
4. Step 4: Simplify right side
   1,172.58x = 1,092,064.17
5. Step 5: Solve for x
   x = 1,092,064.17/1,172.58
6. Step 6: Final answer
   x = 931.33