Finding the Fourth Proportional to 1,172.52, 1,618.06 and 675.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.52 : 1,618.06 = 675.15 : x
2. Step 2: Convert to fraction form
   1,172.52/1,618.06 = 675.15/x
3. Step 3: Cross multiply
   1,172.52x = 1,618.06 × 675.15
4. Step 4: Simplify right side
   1,172.52x = 1,092,433.21
5. Step 5: Solve for x
   x = 1,092,433.21/1,172.52
6. Step 6: Final answer
   x = 931.70