Finding the Fourth Proportional to 1,170.89, 1,615.61 and 673.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,170.89 : 1,615.61 = 673.55 : x
2. Step 2: Convert to fraction form
   1,170.89/1,615.61 = 673.55/x
3. Step 3: Cross multiply
   1,170.89x = 1,615.61 × 673.55
4. Step 4: Simplify right side
   1,170.89x = 1,088,182.67
5. Step 5: Solve for x
   x = 1,088,182.67/1,170.89
6. Step 6: Final answer
   x = 929.37