Finding the Fourth Proportional to 1,167.09, 1,610.61 and 669.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,167.09 : 1,610.61 = 669.72 : x
2. Step 2: Convert to fraction form
   1,167.09/1,610.61 = 669.72/x
3. Step 3: Cross multiply
   1,167.09x = 1,610.61 × 669.72
4. Step 4: Simplify right side
   1,167.09x = 1,078,657.73
5. Step 5: Solve for x
   x = 1,078,657.73/1,167.09
6. Step 6: Final answer
   x = 924.23